Golf IV / Jetta IV :: Car Won't Crank / Start - Faulty Fuel Pump
1999 Jetta 2.0L manual trans
One day out of the blue the car would not crank or start. Checked and found that fuse #14 was blown and would blow the instant another fuse was inserted. Checked all the typical locations for wiring issues usually associated with the comfort module because it had all the symptoms of a faulty module (the power windows did not work and the fuel pump didn't pressurize the system when the driver door was opened, the alarm didn't set, automatic door locks also inoperable).
I checked the dome light, trunk hinges, rubber boot between doors and body and found nothing. Put a jumper wire into the neutral start relay and was able to crank the car. I then replaced clutch safety switch, neutral start relay and installed new (junkyard) comfort module and the car cranked up, started and everything was working normally again...for about 3 weeks. Then it did the exact same thing again. Fuse #14 was blown again and would blow the new fuse as soon as it touched the terminals in the fuse box.
I reinstalled the jumper wire in the start relay in order to be able to drive the car for the last week, and then last night out of the blue the car would crank, but not start. I turned the engine over several times and could hear the fuel pump pumping and even smell fuel, but no start. 3-5 minutes later after random tries to start, the car stumbles to life as if it wasn't getting fuel, and then drove 10 miles home with no issues. I returned the 'faulty' comfort module Monday and got another one but haven't installed it yet because I fear the same thing happening with this one as the other one.
Last night after I got the car home, I plugged in the comfort module and everything worked like it was supposed to. Can a faulty fuel pump damage the control module? I'm trying to get to the bottom of this and fix the problem and not the symptoms so I'm looking into anything that could potentially cause the problem.
Golf IV / Jetta IV :: 1.8t AWP Won't Start - Fuel Pump Not Priming When Key Turned On
Its a 2005 awp 1.8t gti with 180K stage 2 apr. When i tune the key to the accessories on position I used to hear the fuel pump priming but now I don't and the car wont start.
View 5 RepliesGolf IV / Jetta IV :: 2005 1.8t AWP Cranks But No Start - Cannot Hear Fuel Pump Priming
2005 1.8t gti wont start. The other day I was driving on the highway when a thin plastic type wrapping got caught in my serpentine belt. The car immediately died and I hit the gas and nothing and with no power steering i pulled over to the side.
Timing belt was done with water pump and tensioners
Spark plugs and coils are brand new
What fuel line to disconnect to test if the fuel pump works? Like I said in the title I cant hear the fuel pump priming. The engine was running 100% before this 2 techs saw it and the vw dealer i workrd at looked it over.
Golf IV / Jetta IV :: ECP Light Is On - Hardly Any Throttle Response
Mk4 jetta 1.8t ECP light is on, when I lightly push gas, car stalls and cuts off. Where to begin? Here's the vagcom readings:
906-032-AWP.lbl
Part No: 06A 906 032 LP
Component: 1.8L R4/5VT G 0007
Coding: 07500
Shop #: WSC 78901
VCID: 77FDFDB25513C5A6AAD-5140
3VWSE69M12M090016 VWZ7Z0A4180723
18 Faults Found:
[Code] ....
Golf IV / Jetta IV :: Bad O2 Sensor - Hesitation When Gets Into Throttle
What are the symptoms of a bad o2 sensor, 2.0.. My son is having some problems with his car hesitating when he gets into the throttle and the only codes we are getting shows bad O2 sensor pre cat.
View 2 RepliesGolf IV / Jetta IV :: Hesitation At Partial Throttle In 1st And 2nd?
Car is a 20th, 1.8t 6-speed.
I noticed something the other day that is happening occasionally on acceleration. At partial throttle, usually pulling away from a light or stop sign, I get this weird hesitation. It only happens at partial throttle and usually only in first, sometimes in second. As the RPMs increase up to around 3k, it's as if I lose power for a second. You can feel the car stop accelerating for a second, then it begins to pull again.
If it's under heavy acceleration it never happens. It doesn't feel like the clutch slipping, more like the motor hesitating, but there's no noises or missing or anything like that. The RPMs don't jump up or anything. It's like for a second it's making no power, then it comes back.
Golf IV / Jetta IV :: Car Downshifted By Itself When Driving - No Throttle Response
I was driving home yesterday, when all of a sudden felt like the car downshifted by its self. I tried giving it gas but nothing happened. The car still starts up and runs fine there's just no throttle response. I had to drive it home by riding the gears. Today i scanned the car and a few codes came up. I already had some previous codes because my secondary air injection pump is deleted and same with an evap solenoid also had some codes for injectors but im pretty sure that's cause they're not stock and the resistance isn't the same. The codes that popped up including the previous ones.
P1631 accelerator position sensor g79
P1634 accelerator position sensor limp mode?
p1469 evap code
P1433 secondary air pump
P1690 malfunctioning cell light
Im pretty sure that's what each code is for. The last 3 codes were previously existing and the car drove fine.
Anyways i tried cleaning up the contacts on the gas pedal, didn't work. So I looked under my car to look for damaged 02 wires, which i found. Did a super shotty temporary fix, and still nothing works. I heard maybe it could be my ecu? The car is a 1999.5 golf originally a 2.0 but has been swapped with a awp 1.8t out of a 20th, 5 speed Lots of work done to the engine.
Golf IV / Jetta IV :: 1.8t - RPM Going Up And Down / Hesitation After Cleaning Throttle Body
I decided to take out the throttle body and clean it with throttle body cleaner that I got from autozone, after I put everything back, I started my car and the motor was shaking and smoking a lot out the muffler and just would not be drivable at all. the RPM was just going up and down and hesitating bad. later I took off the spark plugs and they were very much burnt black at the tips and that is probably not normal right? but I replaced them with NGK BKR7E spark plugs and it still gave me the problem.
View 13 RepliesGolf IV / Jetta IV :: 03 - Throttle Module / No Accelerator Input Sometimes
I have a 2003 Jetta 2.0 with the drive by wire throttle and I've been having some problems with it lately.
When on the highway (at a constant speed) sometimes it's almost like you take your foot off the accelerator pedal, then when you go to press it more, nothing happens, until you pump it a few times, it works again. This sounds like an electrical problem to me, not fuel or spark, because it's not sputtering at all, it just ignores your accelerator input. Is the "throttle module" a serviceable part?
Golf IV / Jetta IV :: Throttle Body Not Working And Car Is Surging
I have a customer that has a 2.0 mk4 with 260000 miles on it..about 20k miles ago we had 6 codes saying throttle body was not working and car was surging, so we ordered a vdo tb, installed it reset tb and it ran fine for 7 months and 20k miles. Again car is surging, so i tried a tb reset. tb was under guarantee so we took advantage and replaced it/reset it and it threw a code within 5 min of driving and hesitating/surging. He is original owner? possible ecu getting sleepy?
View 22 RepliesGolf IV / Jetta IV :: 2001 - Car Bogging Down At Half And WOT Throttle
I have a 2001 vw jetta 2.0 and I was accelerating on the interstate the other day and the car just started bogging down and now the car only accelerates slowly at partial throttle any more and it makes a loud intake noise and bogs down also the car idles bad and even at partial throttle the car struggles to get above 3k rpm, I scan for codes and got MAF, O2 sensor before the cat and camshaft position sensor, I replaced the camshaft position sensor and car still runs like crap, what is the problem??
View 4 RepliesGolf IV / Jetta IV :: No Power / Throttle Response When Cold
In the mornings no power/ no throttle response when cold, another starts at same day fine til next morning. Car is golf iv vr6 4 motion...
5 Faults Found:
17535 - Fuel Trim: Bank 1 (Mult): System too Rich
P1127 - 35-10 - - - Intermittent
17537 - Fuel Trim: Bank 2 (Mult): System too Rich
P1129 - 35-10 - - - Intermittent
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-10 - - - Intermittent
17547 - Fuel Trim: Bank 2 (Add): System too Rich
P1139 - 35-10 - - - Intermittent
17551 - Load Calculation Cross Check: Upper Limit Exceeded
P1143 - 35-10 - - - Intermittent
Also O2 sensor show on idle -20% to -15% (engine temp 60 C) but vagcom normal was (-10% to 10%) (after reading from ross-tech, maybe O2 readings are off because running rich) and intake air temp was 29`C but outside were 17`C, it has new maf...
Golf IV / Jetta IV :: Hard Bucking At Partial Throttle
Buddy of mine woke up with a GLI that runs like this. Stage 2 Uni, cold air, 3 inch turbo back. [URL] ....
View 2 RepliesGolf IV / Jetta IV :: 2000 - Throttle Body Causing CEL?
So the other day I went to the mechanic for him to see what code(s) were causing my CEL. He simply told me that there was an issue with the throttle body and it didn't know what position to be in; he cleared the codes, clean the throttle body and said if the light came on again I needed a new tb. The CEL came back on, but his diagnosis doesn't make sense to me.
From what I've researched if the throttle body had this issue the car would run like crap; however, it runs fine. Smooth idle, good throttle response, accelerates smoothly through the rev range, and I'm still getting decent fuel economy. Given that, it doesn't seem like it's the TPS either, and the tb was just cleaned so I'm confused. Could it actually be the throttle body, or is there some sensor that has just gone bad? The car is a 2000 Golf with an AEG engine & 5-speed box.
And here are a couple pic for clicks of a stock-ish car.....
Golf IV / Jetta IV :: 2013 - Bucking / Hesitation At Low RPM And 5% Throttle
I have been experiencing this one for quite a while now. The car is a 2003 GTI VR6 24v. It is stock other than a 3" hole in the bottom of the airbox to pull in cooler air.
When I am sitting in traffic, and in 1st or 2nd gear, keeping a consistent speed (10-15mph) and application of the throttle (not moving my foot at all), the car sometimes just decelerates/hesitates/bucks a little by itself, and kind of feels like it is hiccuping or not getting enough air or something.
At high rpm, or in any gear above 2nd, I don't feel the hesitation and the engine runs great and pulls hard. No MIL lights on the dash, and no other problems with it.
Is this normal for manual VW's? Or maybe the hesitation coming from the engine not getting a consistent airflow from the hole in the airbox?
Golf IV / Jetta IV :: 1999 - Erratic Throttle In Wet Conditions
I have a '99 Jetta 2.0, manual. In wet conditions (heavy slush/rain) the throttle will start to behave erratically, you can feel it against your right foot pulsing in and out. The feeling is almost similar to that when you put cruise control on and feel the car take over the throttle and pull it away from your foot and adjust its position. In fact, at first I thought it was a cruise control issue so I pulled the fuse - no better.
From deliberately driving through puddles in an attempt to isolate the issue, it seems that when something on the passenger side of the car gets wet the issue occurs, almost without fail if I drive through a big puddle on the passenger side. Once it starts, it continues for awhile (I guess until it dries). Even at a stop light, you can see the RPM's rise and fall and feel the throttle pulse without any input from the driver.
I have siliconed the ABS sensor on the passenger wheel, as it was the only exposed sensor I could see when I pulled the wheel off. My question: What sensor under the car could have an effect on throttle? Something is shorting or reading erroneous signals when wet and is causing the computer to think it needs to correct the throttle position. I'm at a loss as to what it could be and google searches have yielded little results.
Golf IV / Jetta IV :: Throttle Hesitation Between 2000 And 3500 RPMs
So,I have a mk4 GTI vr6 . I've got an idle that moves about 25 rmps up and down. As well as the throttle hesitation between 2.000 and 3500 rpms only at mid throttle. Has a kinda new maf. That I cleaned. clean THrottle body kinda new coil pack and wires , new plugs. Tried a lot it all worked but it's still there.
View 11 RepliesGolf IV / Jetta IV :: EPC Light Keep Coming On - Faulty Throttle Body
I have been having the dredded EPC light coming on and according to the vag scan its the throotle body. What I need to know is if one off a 2003 2.0 jetta will work on my 2004 2.0 jetta. The number on the side of mine 06A 133 062s is not the same number on the 03. I was told that they must match to work properly.
View 2 RepliesGolf IV / Jetta IV :: 2001 - Computer Failing Or Throttle Sensor?
2001 1.8T Wolfsburg
Started it this evening and went to the store, on my way there the car was right messed up. No lights, wouldn't go over 500 rpm (no throttle response), eventually was stuck on the side of the road. Reset my throttle back to OEM and everything went back to normal, car hasn't shown any trouble since but it's only been a couple hours. I don't want to end up stranded somewhere so I'm wondering if my computer is possibly failing or should I try replacing the throttle body if it does it again?
Car is not chipped and was OEM throttle before (to my knowledge).