VWDiesel.net The IDI, TDI, and mTDI source.

General Information => Troubleshooting => Topic started by: LoneWolf on January 24, 2009, 06:29:05 pm

Title: Weird vibrations through the throttle pedal
Post by: LoneWolf on January 24, 2009, 06:29:05 pm

if i hold constant with the throttle pedal, it vibrates like crazy, but if i plant my foot it goes smooth.

 all the bolts are tight on the pump, so i know its not rotating at all

 has anyone experienced this, and if so, did you find the cause?

 thanks guys,

       Matt

Title: Weird vibrations through the throttle pedal
Post by: Smokey Eddy on January 24, 2009, 06:48:34 pm

bizzare.... It's almost always been a loose pump. Check the timing perhaps?
Maybe look for air in the fuel lines?
does it idle ok?

Are your wheels balanced properly?
Does your car drive straight with you let go of the wheel?

Title: Weird vibrations through the throttle pedal
Post by: LoneWolf on January 24, 2009, 06:53:10 pm

wheels are all fine, no hands on the wheel its as straight as ever, there doesnt appear to be any bubbles in the fuel lines.

 idles a tad rough, but its always done that, and the timing is spot on

 im really confused and slightly concerned :?

Title: Weird vibrations through the throttle pedal
Post by: Smokey Eddy on January 24, 2009, 07:05:02 pm

meh i wouldn't be concerned. Old cars rattle?

Is it vibration through only the pedal or the whole car?

because think about what the pedal is connected to... the pump (and thats it) so if the pedal vibrates, the pump is vibrating...


Just think about how diesels work...

fuel in, compress, power stroke, exhaust, intake, compression, power, exhaust .... and so on.

No sparking that could be delayed only fuel injecting that could be delayed/off time....


Does it start really well?

Maybe your pump needs to be rebuilt. (the shaft might be flopping around in there)

and isn't it like 3am for you right now?

Title: Weird vibrations through the throttle pedal
Post by: jtanguay on January 24, 2009, 07:33:51 pm

could be a loose cable?  does it do it at any RPM or just a certain range?

Title: Weird vibrations through the throttle pedal
Post by: LoneWolf on January 25, 2009, 12:27:51 am

"and isn't it like 3am for you right now?"

 yes it was :?


 i dont know about it being the pump, it did it with my old gtd engine, now its got the aaz and still does it

 could it possibly be something to do with the front engine/gearbox mount do you think?

Title: Weird vibrations through the throttle pedal
Post by: burn_your_money on January 25, 2009, 08:13:15 am

Is it just the pedal vibrating or is it the whole car?

Title: Weird vibrations through the throttle pedal
Post by: the caveman on January 25, 2009, 10:13:43 am

I seem to remember that was because the pump was going. You're feeling the shaft moving sideways with every compression stroke. I'm saying for sure. you say it works okay with full throttle, how is it on the highway, does it seem to lack power/ Any air in the fuel line?

Title: Weird vibrations through the throttle pedal
Post by: LoneWolf on January 25, 2009, 11:06:49 am

right, quick update: front mount collapsed today, smashed the radiator, snapped some cables and has caused me to fall out with the car again :evil:

Title: Weird vibrations through the throttle pedal
Post by: the caveman on January 25, 2009, 11:48:28 am

I think it's time to do an ol' yeller to it...

Title: Weird vibrations through the throttle pedal
Post by: Smokey Eddy on January 25, 2009, 02:48:57 pm

Quote from: "LoneWolf"

right, quick update: front mount collapsed today, smashed the radiator, snapped some cables and has caused me to fall out with the car again :evil:

 :(

Title: Weird vibrations through the throttle pedal
Post by: LoneWolf on January 26, 2009, 09:58:50 am

Really not having a good time lately :cry:

Title: Weird vibrations through the throttle pedal
Post by: jtanguay on January 26, 2009, 10:27:34 am

was the front mount rusty? how the heck did that happen? was the mount bad?

Title: Weird vibrations through the throttle pedal
Post by: LoneWolf on January 26, 2009, 12:04:54 pm

the mounts in 2 pieces now, so i recon its been going for a while, and possibly the vibrations from the engine may have loostened the bolts a bit?

 i dont know.

 im going to try and finish her tomorrow, see what i find. if its not worth repairing, ive got a tasty 1600 petrol jetta thats look great with a smoke trail...

Title: Weird vibrations through the throttle pedal
Post by: Smokey Eddy on January 26, 2009, 01:30:31 pm

Quote from: "LoneWolf"

the mounts in 2 pieces now, so i recon its been going for a while, and possibly the vibrations from the engine may have loostened the bolts a bit?

 i dont know.

 im going to try and finish her tomorrow, see what i find. if its not worth repairing, ive got a tasty 1600 petrol jetta thats look great with a smoke trail...

If it's not worth repairing do solid engine mounts! do you have a welder?

Title: Weird vibrations through the throttle pedal
Post by: LoneWolf on January 26, 2009, 05:44:09 pm

ive got some Vibro-tec (sp) solid mounts already, but ive been saving them for something special