Camry :: Car Runs A Bit Sluggish At Highway Speeds

My 2004 Camry 3.3 V6 (3MZ-FE) has started to run a bit sluggish at highway speeds and sometimes in stop and go traffic.
This P0430 code came on after a recent oil change and flushing my engine with seafoam.

The info I've gotten from my auto parts store is that it's one of the oxygen sensors, HO2S or Bank 2. I believe, if my research is correct, that this sensor is post cat. Looking down from the front of my engine I can see 2 sensors after the cat pretty close to each other.

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Suburban :: 2000 - Running Into Vibration At Highway Speeds Along With A Clicking Sound At Idle Speed

I've got a 2000 Suburban 1500 4WD with the Auto 4WD. I'm running into a vibration at highway speeds along with a clicking sound at idle speed which speeds up and slows down with speed. I've discovered the u-joint on the front drive shaft where it connects with the transfer case is worn and has play in it. Could this cause the vibration?

Also, The front drive train spins any time the vehicle is motion, which is to say the front drive shaft spins as the truck goes down the road, correct?

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S-10 :: 1999 Chevy Transmission Downshifting At Highway Speeds When Slightly Let Up On Throttle

My S10 started downshifting at highway speeds when I slightly let up on the throttle. It only starts after driving 20 or 30 miles down the road. (gets hot?) It also hesitates slightly starting from a dead stop as well after that. I dropped the pan, cleaned it up and added new fluid. There was a fine powdery sludge on the magnet in the pan, but no metal shavings. It is still doing the same thing.

It has 95,500 miles on it. 2.2 motor. The fluid was low a couple weeks ago. I added a bottle of conditioner. Don't remember the brand name. 2 reservoirs in the bottle so it mixes as you pour it in. It started acting up 7 days ago.

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Chevrolet :: 1999 Truck Won't Restart After Driving At Highway Speeds For More Than 20 Minutes

I have a '99 Chevy 2500 diesel truck. After driving it at highway speeds for more than 20 minutes and turning it off, it won't restart. The problem seems to be in the battery cable and is definitely heat-related. In cold weather or after a fairly short drive, all it takes is popping the hood to cool off the engine compartment, and waiting. If the engine and/or the weather is too hot, that can take an hour. Then it starts just fine. I've cleaned the terminals and made sure the connections are tight. Two mechanics have looked at it and were stumped.

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Toyota - Rav4 :: Unexpected Shut Off When Driving On Highway At 65 - 70 Miles Per Hour

Yesterday, I was driving on the highway at a 65-70 miles per hour (basically pushing it for my '96 RAV4). Suddenly, the car turned off. The engine cut out and the battery and oil signal came on. It did not lurch as if I had popped the clutch, nevertheless, I went to restart it as I was going down the hill and it made it home for the next 40 miles.

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Ford Super Duty (1999-2016) :: 7.3 - Stumble And Misfire At Highway Speeds

The other day I pulled into the parking lot put it in park and let it idle for a couple minutes, it stumbled and when I started driving off it was missing. I pulled the valve covers off and check the connection.. I drove it home and it had a bad misfire at 1500 RPMs. The truck shook violently at that RPM but when I got it up over 2000 smooths out..

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Ford 7.3L Power Stroke (1999-2003) :: Clunk / Vibration When Traveling At Highway Speeds

I'm a mechanic but work only on cars so I'm a little shy on diagnosing trucks. I have a 2001 7.3 f250 4x4 short bed, when I give it gas I can hear a clunk, when I let off of the gas I also hear a clunk. Also when traveling at high way speeds I can feel a strong vibration when I very lightly give it gas but the vibration goes away as I give it more gas.

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Ford Super Duty (1999-2016) :: Rear End Shudders When Braking At Highway Speeds

I have an '04 EX with 6.0. When braking at highway speeds the rear end shudders until I get the truck slowed down some. Around town speeds of 45 or less the problem is almost non-existent. It almost seems to be hydraulic instead of pads/rotor issue. Wouldn't a warped rotor show up at slower speeds as well? I have some good mechanics around, but have never found a great brake shop that I can trust. Go in needing pads and they try and upsell saying this or that is going out.

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Ford Super Duty (1999-2016) :: 2011 F250 Shake At Highway Speeds Around 70 To 75 MPH

I have a 2011 f250 6.2 cclb and it shakes around 70 to 75 mph. Not terribly but enough to annoy the crap out of me. Now I have put new tires on it recently, new Rancho 9900 adjustable shocks, I have it aligned regularly and tires rotated and balanced every 5000 miles or so. I have had two dealerships look at and my local shop and they can't see anything visibly wrong with it.

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Ford 7.3L Power Stroke (1999-2003) :: Surging Noise While Driving At Highway Speeds

I have a 45 min drive to work every day, all highway. Lately on the way home in the afternoon I have been experiencing a surging noise that seems to just happen while I'm doing hwy speeds. It sounds to me like the fan is tuning on and off. Is that possible? It comes on for a few min. And then off again. I have new icp ipr cps. New oil and filter and fuel filter.

Also I'm still having a battery light on and off issue while I'm driving. Is possible the two issues are connected. I plane on doing extensive search for a bad wire this weekend. Batteries and alternator have checked out and are fairly new.

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Ford Super Duty (1999-2016) :: 2014 F250 6.2L Gas Engine Stalls At Highway Speeds

2014 F250 SuperDuty 6.2L gasser, x-cab long bed work truck. 105k miles, original owner, 1 driver, mostly highway miles, well maintained and super clean truck.

First issue occurred at 83k miles, Aug 2016. Warm summer day climbing I-70 in CO, slightly loaded, and just entered the Eisenhower tunnel (11,150' altitude). Lost power, no RPMs - not running, I put it in N and rolled as far as I could. Hazards on and no-where to pull over, hugging the wall and blocking one lane. Power OK - will crank, no fire. 1/3 tank on the fuel gauge and >100 miles distance to empty on the trip computer. Tunnel rescue shut down traffic and pushed me out into the daylight.

After waiting an hour to fill our paper work for disabling the interstate tunnel I returned to the truck which quickly started. No symptoms, no lights, no codes. Topped off the fuel tank after a easy 15 mile drive downhill. Drove another 800 miles symptom free to my destination and checked it in at the dealer. At this time a check engine light had finally illuminated - PO420. I shared the story of stalling out at highway speeds with the Service Writer. Dealer replaced the cats, confirmed fuel pressure OK, computer condition OK, serviced the trans (at my request).

No symptoms reoccurred during the next 20k miles until last weekend. 105k on the OD now. Heading to Flagstaff, AZ on I-40 in similar conditions. Hot, AC running, climbing in elevation, slightly loaded, running on the bottom 1/3 of the fuel tank... Died while cruising at 79 mph. Well, at least this time I wasn't in a tunnel and had a shoulder to pull off on. Deja-Vu - full power, radio on, no engine lights, gauges normal, fuel reads over 1/4 tank, >100 miles till empty on the trip computer - won't start. Cranks, but no fire. Some sputtering during start attempts must have triggered the next trouble code.

Opened the hood, removed the gas cap, let it vent and cool for about 30-40 mins while I took a walk. Returned to the truck which easily started and let me drive to the next fuel station, 30 miles away. This time the check engine light stayed illuminated. It took 24 gals of fuel. Drove 3 more hours and almost 200 miles without symptoms - check engine light still illuminated keeping me curious and fully alert along the way.

Got the codes pulled at a parts store that was open on Sunday. PO300 & PO301. Random misfires and cylinder 1 misfires. Sounds consistent with poor fuel supply? Spent the rest of the day searching forums for any clue to this highway stalling. All I came up with was to clear the computer - disconnect battery, turn lights on, wait 15 mins, reconnect battery, start engine, apply brake, drive, etc. This and another full tank of gas gave me enough courage to set out on my trip home.

Next occurrence was just outside of Santa Fe, NM. Similar conditions again: Hot day, AC kicking, Interstate travelling about 80mph, slightly loaded, climbing in elevation, fuel tank just below half - stalled out. Repeat previous learned routine. Open hood, vent gas cap, walk it off for 30 mins, return to truck, start it up. Drive to next town and top off with fuel about 30 miles away - only took 16 gals! Made it home 4 hours later without stopping. No repeat symptoms, no check engine lights.

The next day a code - PO420. Catalytic efficiency below threshold.

Quick recap:

6.2L gas engine stalling at hwy speeds.
Cruising between 65-80mph
-Interstate travel - no stops between last fillup and stall.
-Warm weather, AC on
-Running on bottom ~1/2 tank
-climbing in elevation, slightly loaded

To clarify: slightly loaded - no trailer, maybe 1,500 lbs bed cargo, mostly wind drag. The most I have pumped into the fuel tank is 29-30 gals or so. I assume I have the 34 or 35 gal tank. Never seen the calculated "distance to empty" below 40 miles.

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Ford Super Duty (1999-2016) :: F250 - Door Corner Rattle At Highway Speeds

My factory-ordered 2016 F250 CC SB 6.2L 4X4 3.73 is about 6 weeks old. Driver and passenger side door rattle noise (in upper back corner) at highway speeds (65-75 mph) has gotten progressively worse over those 6 weeks. See attached video.

Trying to determine if this is caused by:

Door seals: the temperature here in Iowa has dropped from a few weeks in the 90's to the now in the mid-60's.

Could the temperature change have caused the seals to change shape/structure and result in the rattle/noise?

The exterior seal between the front and back doors (attached to front of the back door): mine seems a little loose on top, but nothing that would cause this kind of noise.

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Ford Super Duty (1999-2016) :: 2003 F250 - Moaning Noise From Front End At Highway Speeds

I noticed a moaning from the front end a few weeks back and it seems to be slowly getting a little worse. It is only noticeable when I'm accelerating or maintain speed, but as soon as I let off the accelerator and start to decelerate, it goes away. Sometimes, when the truck hasn't been driven for at least a couple hours, I pull away and there is a really noticeable sort of "clunk clunk clunk" but then it goes away and it just moans. I can also hear some noise from the front end at highway speeds, but of course it is hard to hear much else other than engine and road noise from the cab. It's a 2003 F250 with a 7.3 and four wheel drive.

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Ford 7.3L Power Stroke (1999-2003) :: Intermittent Engine Light / Momentary Surge At Highway Speeds

I have a 1999 F350 200,000 miles. Now getting an intermittent engine light. Still runs well, although once or twice I felt a momentary surge at highway speeds. The light is on intermittently about 1/2 time. I read the codes and the following codes, as in the thread title, came up:

P0280 - ICP circuit out of range - low
P0113 - intake air temp sensor circuit - high input
P0470 - Exhaust back pressure sensor circuit malfunction
P0478 - Exhaust pressure control valve - high input

What would make these all code at the same time? Would these not make a noticeable problem driving? And how do I resolve these?

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Electrical-wiring - Chevrolet - Suburban :: Dead Battery - Ride Control Compressor Runs For No Apparent Reason When Car Is Off

I have a 2001 Suburban (chevy) 5.3 liter Vortec engine, auto trans 4 wheel drive, fully loaded. As of late I come out in the morning to find a dead battery. this happened before and I disconnected the fuse for the dvd player that was installed aftermarket. some times I have to hit my dashboard to get the dash lights to work, now they dont work at all. sometimes the ride control compressor runs for no apparent reason when the car is off. I replaced the battery 3 years ago and it seemed to solve the problem until now. I replaced the battery with an optima red top yesterday and now the electrical system is going haywire. the ABS light is flashing and the service ride control light is on, the fuel gauge is bouncing back and forth from full to empty. What should I do. I am a fair mechanic but electrical is not my forte.

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Ford 7.3L Power Stroke (1999-2003) :: Strange Noise Occurs At Both Highway And Surface Street Speeds - Throttle Related

I have a strange noise that occurs at both highway and surface street speeds. On surface streets at low speeds 45 mph and under, if I let off accelerator to coast and lightly step on accelerator I get this quick sharp noise.

Everything I have read regarding a similar noise is under load and being described as a turbo fart. Clearly I am not under any load. I'm lost.

Definitely not a low woooo noise. Also not a hard accel and release and definitely no chuckle and or popping. The sound is high pitched and quick, roughly .5 to 1 second at most. The sound is more like a "zzzrrp" or "zzzoop". I can replicate the sound 50% of the time easily at speeds under 45 mph by briefly coasting (no accelerator) and lightly tapping the accelerator and releasing or holding. Occasionally this sound will occur at full stop when I step off of the brake pedal and before I step on the accelerator. This sound can also occasionally be heard at highway speeds under similar accelerator conditions though it may be more frequent and I just don't notice it.

Would this condition throw a code? Just received "Total Ford Scan Tool Package Enhanced Bundle SP03" scanner from autoengenuity. Hoping to put it through its paces tomorrow.

Additional info: 145k miles. Injectors serviced by a reputable diesel shop here in Vegas approximately 1.5 years ago. Unknown oil leak where oil is collecting in the valley on top of the engine beneath the turbo. HPOP seals were replaced roughly 1 year ago at another reputable diesel shop here in Vegas. Still have an oil leak (turbo related?) Oil is under 500 miles old and acceptable level. Fuel filter is due for a change but that does not seem to affect condition. Air filter 1000 miles. Thinking about upgrading to AIS severe duty kit soon.

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Ford 7.3L Power Stroke (1999-2003) :: 2000 - Occasional Miss At Highway Speeds / Bucking And Jerking During Even Gentle Acceleration

165k miles 4x4 6 speed, bone stock unmolested

Slowly progressing problem over 6 months. Occasional miss at highway speeds uphill has progressed to bucking and jerking during even gentle acceleration attempts.

I hadn't got my cam sensor recall done but no change after that procedure completed yesterday. Oil recently changed as well.

I have a torque pro but it never finds any fault codes even though 'service engine' light comes on sporadically. I'm not sure I'm operating it properly but it at least reads rpm when its running.

I'm contemplating the hutch mod but I'd like to have an official diagnosis beforehand if its possible in my case.

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Suburban :: Shakiness While Accelerating In Passing Gear At Highway Speed

I just had four new LT E rated tires installed (balanced). Alignment is good and did not require adjustment. Tires are correct size for the vehicle. I noticed during an extended highway trip yesterday that the truck (94 K1500 Suburban) seemed to shake or rather bump slightly when I was accelerating to pass in the sixty-five to seventy-five mph range. Almost seemed like driving on a fine washboard. I looked at the balancing weights which on three of the wheels appear to be nearly the same size. Then I noticed the right front weight is obviously larger than the other three. Could this be the problem?

There's a bit of a story here. (Isn't there always?) I bought the tires from one source (whom I would never trust to do any repairs) and had a shop I deal with regularly close to home install them. The morning after the install I went to check the pressure cold and discovered that the right front tire was a standard tire while the others were the LTs which the bill showed I had paid for. So I missed this when I bought them (they threw them in the back of the truck after assuring me all four were the same) and my mechanic missed it when they were installed. Now the tires do look almost identical but the lettering on the standard tire was black both sides while the LTs were white on one side. Of course the standard tire has a lower maximum psi rating.

I went to the mechanic first and he admitted to noticing this but I guess it just didn't register with him to double check to see if it was actually a different tire before mounting it?! I should say I am having second thoughts about using this shop in future, especially after they under inflated the tires at 30psi as well. When I told him I was running 45psi he looked at me like I was from Mars but then, upon checking his Mitchell Manual he says that yes, this truck should have 45 to 65 psi. Anyway, the guys who sold me the wrong tire made good on the problem however they installed and balanced it and I'm wondering if they got this part wrong hence the vibration I'm getting at around seventy-five.

The work order from the guys who installed the tires also states I need two upper ball joints, pitman's arm and left outer tie rod and alignment (which I understand is standard when doing this job). Now I had them show me this and while I'm no mechanic I could see the play in the ball joints was extremely minimal and pitman arm almost negligible (the mechanic had a lot of trouble showing me this had any play at all and admitted he had seen much worse). The boot on the left outer CV joint is also split and missing its grease. I'm not saying the suspension is perfect but I think they are on a fishing expedition here and I am skeptical this is what is causing the vibration at high speed because I never noticed it until the new skins were applied.

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Suburban :: EGR Code After Driving At Sustained Speeds Above Forty Mph

94 GMC 5.7 K1500 .... I have been getting an EGR code after driving at sustained speeds above forty mph. The code gets stored for say less than thirty starts then disappears until I hit the highway again. I took the EGR valve off, cleaned it with carb cleaner (really soaked it) until all the black crud stopped coming out, replaced the gasket and reinstalled it. Back on the highway and the CEL is on again (goes out after a few minutes/miles) and the code is back. I went to the auto parts store and got them to show me a replacement valve. When I shook it there was a slight rattle (which I assume is the diaphragm). On the other hand mine offered no rattle sound after cleaning so I'm wondering if the valve is pooched. Anyway my question: whether the problem is

a) the valve,
b) the solenoid or
c) dirty EGR passage in the manifold?

Depending upon the cost of the diagnostic (ie if it exceeds the valve) I'm probably going to just go ahead and replace it. I don't need a smog test until next Spring.

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