Okay guys I've got a twin turbo manual that just came to me today , I bought it knowing the first 2 are missing , I've pulled coilpack and plugs and checked both to be working fine , I've ran the engine and unplugged the 2 suspect and no change. I've done a compression test bearing in mind that this is cold I didn't drop no oil down the cylinders

1: 116

2:116

3:125

4:150

5:150

6:120.

There's fuel on the plugs when I pulled them so fuel is being dumped in ... Strange

Thats some bad results for ya there.

Tt should be upwards around 160-165psi each.

Would look to be a beginning of a rebuild with them results.

Okay guys I've got a twin turbo manual that just came to me today , I bought it knowing the first 2 are missing , I've pulled coilpack and plugs and checked both to be working fine , I've ran the engine and unplugged the 2 suspect and no change. I've done a compression test bearing in mind that this is cold I didn't drop no oil down the cylinders

1: 116

2:116

3:125

4:150

5:150

6:120.

There's fuel on the plugs when I pulled them so fuel is being dumped in ... Strange

 

Could be a variety of things but fuel on the plugs is not proof the injectors are working correctly, they could have a poor spray pattern or could be leaking fuel drowning the plugs and hence the plug not firing, this could even causing some bore wash and hence the lower compression figures, test the injector resistance as a start and should be around 14 Ohms give or take.

 

Jeff TT

I know the first 2 look low in comparison but they are holding compression and the test was done cold too , the guy who had it before me said he has checked injectors but I will double check can a faulty ptu cause the first 2 to drop ?

Also I didn't have the throttle wide open when doing the test is that a problem ?

Do it again properly Josh lol, with the throttle wide open and warmed up if poss, will give a better indication.

Fixed guys! Lad who had it previously had fitted coilpack connectors the wrong way around , there was a bit of oxidisation on one of the fuel injector connectors so I have gave them all a clean , pulled plugs and gave a clean etc , bit of oily smoke on startup but car had probably been sat a long time as it's now gone and hasn't returned touch wood ! Great stuff and a good day !

Edited July 30, 201411 yr by joshlake

Nice one! Good when you find something proper conclusive like that.:)

Yeah definitely , not always the case with our zeds though lol!