Missing At High Revs

[joe_g40 0]

hi, i am nearly finished on my track 1.9 gti but took her out for spin yesterday and it seemed fine until high revs. The car pulled very strongly until 4k rpm then it sounded like a rally car on the start line. Struggled to get past 4k with v loud backfiring and popping. As i said it drove very well and smoothly until then. Any ideas would be good. Thanks joe

[S@m 156]

Im going to say what i always do....I had this exact problem because of an ignition amp fault; just couldnt get past 4000rpm. Although thats not to say its the only possible cause. If you can find a known working one to swap to then do it just to rule it out.

Sam

[Anthony 1,003]

Yup, ignition amp would be the first thing I'd try as a 4000rpm rev-limiter like misfire is a common failure from them.

[kyepan 291]

also check in between distributor and cam shaft for oil ingress into or onto the distributor.

[Alex G 0]

Ive had the exact same sproblem when I did some dodgy wiring with resistors to get the tacho working on my 2.0 turbo.

It sounds ignition amp related - also worth checking incase you touched any wiring to the coil?

[joe_g40 0]

hi, thanks for replys. I have fixed problem now. Seemed to be the ignition module. The plate it was mounted on obviously wasnt making a good enough connection so i scuffed up both surfaces and now it revs freely. Thanks guys.

[S@m 156]

Hope you used the heat transfer paste when you refitted it!

Sam

[rescue dude 0]

Hope you used the heat transfer paste when you refitted it!

Sam

 

 

Where do you get that from?

[welshpug 1,657]

most places like Maplin, its silicone based afaik, gets used in computers IIRC too so maybe PC world?

Edited June 17, 2010 by welshpug

[rescue dude 0]

most places like Maplin, its silicone based afaik, gets used in computers IIRC too so maybe PC world?

 

 

Cheers, need to change the amp on mine so i'll give it a go.