misfiring

[clarkie 1]

can any 1 help! got my engine in and all 2geather but seems 2 have a bad misfire. checked the leads and plugs and all spark so duno wot else 2 check. has been stood 4 a while and wot wet but blew everythink off with air line and sprayed with wd40 but stil no change. wot do you lot sujest?

[vr6turbo 27]

hi sorry to hear about the vr not growling !dodge

did you time the cams when you put the engine back together

or was it complete when you installed it?

the reason i ask is because if the cylinderhead was replace you would have to time the cams and people know that it can be tricky and cause missfires if not done correctly

what rpm does the car miss fire

if the engine was running before you replaced it then i would look at

1 plugs and gaps

2 leads ( check in the dark and look for and lsten for the spark jumping to the cylinderhead (it has happened to me due to bad leads)

3 correct grounding of ignition system and coil pack

4 coil pack hard

5 fuel pump or regulator

6 tank breather pipe blocked listen for vacuum when taking the filler cap off (it happened to me)

7 vacuum leak in intake piping

8 idle stabilisation valve (if the engine missfires at idle) idle

9 MAF mass airflow sensor

best to have someone connect the vag com up and see if it throws any fault codes

i would be willing to help free of charge (OK A PINT)if you are near scarborough

i have a lap top the vag com program

obd1 and 2 systems

at least you wont have to pay the stealership 50 to 80 quid

hope this helps

[clarkie 1]

thanks for your help mate . last night i swapped the injecters with my old ones and it cured it so i took it for a drive and then went back to a bad misfire again. i didnt change the fuel rail tho so maybe some crap in the fuel rail and blocked an injector again maybe. il try changing the fuel rail and wil try vacume pipes like u said. once again thanks for ya help really appreciate it . stuart

[clarkie 1]

stil no good changed plugs ,lead , coil pack injectors checked all pipes for splits or leaks but stil running like a tractor. does any think it could be head gasket ? or a valve sticking? if not goin to have to get it on a tester.

[mightyvr6 0]

Have you given the cam sensor a good clean? Could also be the maf.

[Eat this 2]

have u got the leads on the right cylinders?

[clarkie 1]

have changed the cam sensors and have checked the leads are on correct . even chabged the leads

[clarkie 1]

just 2 let ya all no i have done the timing 2day, 1 tooth out. all seem good til i took it out. its all good til i let the gas off then put bk on it seemes 2 hesitate. also when i revers it firefires just as bad as it used 2 before i did the timing. now this has realy puzzled me. any ideas?

[mightyvr6 0]

Have you plugged in diagnostics?

[clarkie 1]

nope but can get it done in the week. so wil do that and see wot it says

[vr6turbo 27]

let us know how it goes

i would try diagnostics as mighty vr6 mentioned then you can eliminate alot of guesswork

[clarkie 1]

hey . car seems 2 be much better now. i did all the timing ( wot a mission that was) but made no difference but while doin it noticed a broken wire on the main wiring loom duno wot its for. solderd that and seems 2 be good so hopefully it should be sorted. thanks evry 1 who posted for all ya help i appreciate it . tip: check all the simple things first lol

[Guest Barney20]

I also have the same problem. I've changed the injectors, cylinder head, head gasket, spark plugs, leaeds and coil pack. i've plugged it into the computer 1 fault found with the egine speed sensor (no signal) going to replace that tomoz .