Chris H help me

Level 5 User Joined: 07 Apr 2006 Posts: 111

I am having trouble withe my valver she is only firing on three cylinders I have changed the plugs, leads, dis cap and the rotor arm. after I have changed the plugs checked them again the seconed cylinder plug was clean but checked the plug if it was sparking its fine. any ideas ???

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

well if its not missfiring and theres a spark then theres eithe rno fuel or no compresion.

Does it smell like theres unburnt fuel? From the fact its clean i would imagine not.

With the engine running put your finger on the injector, you should feel it clicking. if you can't then theres either a wiring issue or a duff injector.

if it is clicking then it may be clogged and no fuels coming out.

to rule out wiring ungplug the injector harness from the plastic guide and then swap the wires with a neighbouring one. if the missfire moves then its the wiring, if the missfire is still on the same cyl then the injector is clogged.

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

check the loom where it runs under the inlet manifold, it can rub through under there if some numpty hasnt clipped it in properly after doing work, i had one go like that.

Level 5 User Joined: 07 Apr 2006 Posts: 111

The clean spark plug smells of petrol I swapped the 2 injector with the third one and it is still not firing on the second cylinder. I had the compression checked a few weeks ago its was perfect after that the car has been sitting on the drive since. there cannot be any way for the valves to go by ticking her over on the drive ??? I am going to take the injector harness of and check it over with a multimeter see if its ok. Any other ideas ????

Level 5 User Joined: 07 Apr 2006 Posts: 111

I checked the injector harness its fine I think I better have the compression checked again I'm dreading it.

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

yep get the compression checked. If theres fuel and spark but nothing happening then gasket.

Level 5 User Joined: 07 Apr 2006 Posts: 111

I hope it will be the gasket I am dreading if it could be a bent valve touch wood. Having it done tomorrow while I am having the sill welded

Level 5 User Joined: 07 Apr 2006 Posts: 111

just had the car back from my local garage had the sill done did a very good job only cost me Â£80 sorted. did the compression test its fine but they found the ht lead was on the wrong way on cylinder 1 and 2 I feel like a twat now

Level 5 User Joined: 10 Jul 2005 Posts: 112

lol

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

sssshhhh.... you keep quiet when you make a schoolboy error like that!

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

or make it sound more dramatic than it was like the piston was missing

Level 5 User Joined: 07 Apr 2006 Posts: 111

well at least the problem was not expensive and I was man enough to emit to the problem for a competence ex mechanic

Posted: Mon May 29, 2006 8:19 am

Farnboy";p="96110 wrote:

just had the car back from my local garage had the sill done did a very good job only cost me Â£80 sorted. did the compression test its fine but they found the ht lead was on the wrong way on cylinder 1 and 2 I feel like a twat now

So they charged you Â£80 for swaping 2 HT leads round! Evil or Very Mad

Level 5 User Joined: 07 Apr 2006 Posts: 111

no for the welding on my sill it was a big job but I used to work there so I had it cheap also I had a new valve on my tyre and sorted the missfire out that was free.

I only go the garage for tyres and finding problems out on my cars I do the work myself.