I was having a great deal of trouble finding the cause of a misfire on my no.1 cylinder. I change the coil pack twice for know good ones, checked the injector was firing properly, changed both the coil and inj connectors for new ones, tried a different spark plug but still the misfire was there!

 

I then had a look at my relocated PTU and the 7 pin side had been getting water in to it and had rusted up plus the loom connectors were green! A quick clean up and the misfire had gone :thumbup:

 

Need to replace the loom part that's corroded and re-think my location for the PTU (on inner wing next to batt) but I call that a result.

Nice one, always like hearing easy fixes to annoying problems

hi,anybody like to try and help with this not so quick fix??? 1990 tt auto,sluggish holds back then stalls, smells of fuel, the tappets started to rattle got into work lifted the bonnet and smoke everywhere,i reved the car the smoke out the back was going between black and grey with a back fire....that was about 2 ish finished work about 8hrs later thinking it aint going to start, fired straight up drove like 4 miles into my 8 mile dive home it started to rattle a bit i left a bmw of the lights like there was nothing wrong with it...im confused, any help would be great thanks......

hi,anybody like to try and help with this not so quick fix??? 1990 tt auto,sluggish holds back then stalls, smells of fuel, the tappets started to rattle got into work lifted the bonnet and smoke everywhere,i reved the car the smoke out the back was going between black and grey with a back fire....that was about 2 ish finished work about 8hrs later thinking it aint going to start, fired straight up drove like 4 miles into my 8 mile dive home it started to rattle a bit i left a bmw of the lights like there was nothing wrong with it...im confused, any help would be great thanks......

 

Haven't got a clue what's causing this problem mate :confused1:

 

I've started a new thread for you as you'll probably get more help that way.

thanks for your time,my son took it to his garage this morning,they are going to put everyone on it,good lucki say lol

maybe sticky valves causing the rattle get the timing belt aligment marks checked as well, for the sluggisness,

 

fuel smell check all the fuel line connections and the one under the throttle linkage,

 

HTH