Good Morning guys

I'm hoping for some advise. My Felicia pickup is not very well. Has a lumpy idle and is pinking really badly under any form of load on the throttle gets worse the hotter it gets.

It's a 1.6 AEE engine.

I have checked the following.

• Cambelt timing = Okay

• Replaced, Knock sensor, Lamda sensor, engine coolant sensor, plugs, cap and arm.

• Checked engine fault codes - 01249 Injector for cylinder 1 (N30) sporadic open / short circuit to earth. This fault code cleared and has not returned even though the problem is still very much apparent.

• Cylinder compression test, #1 120psi #2 120psi #3 90psi #4 90psi (I left the compression tester attached to each cylinder and the pressures did not drop.

I have checked the spark to each plug and they are all firing. If I remove the leads from cylinders #1 or #2 when the engine is running the engine dies. If I remove the leads from cylinders #3 or #4 it does not make a noticible difference to the idle.

Do I have faulty injectors? Or are the compression results to low on cylinders #3 and #4? Or am I mistaking pinging for internal engine failure?

Hope someone can offer some advise.

Kind Regards

Nick

Have you tried a new set of leads? Could be one breaking down under loads and causing a missfire. You seem to have replaced everything else.

The leads are fairly new and they are definitely firing when I pull them off at idle, I got a nice bolt off one of them.

Ok if they are fairly new, but firing at idle is easy compared to firing under load.

Thanks for the reply, for the price of them I could always try, I don't think this is the issue though.

The poor idle is under no load and when I pull the leads off cylinders 3 and 4 individually the engine idle does not alter in anyway indicating a problem with these cylinders. The spark coming from the end of the HT leads, when I do this leads me to believe the HT lead is working.

Edited 29 May, 201610 yr by eeelie

I'll swap the leads around if they are long enough and see if it moves the problem to cylinders 1 and 2

I'd do a cylinder leakage test on 3 and 4, see if you have an issue there.

No difference swapping the leads around , still cylinders 3 and 4 the issue.

They both hold 90psi for 5 minutes on compression test with no signs of dropping.

I think I'm going to have to take the head off

Done some research, I miss understood what a cylinder leakage test is. This is something you can't do with a standard compression tester. The only thing I have proved is my gauge holds pressure not the cylinder

How many miles?

Hi guys,

Now running sweet. Looks like the head gasket had blown between cylinders 3 and 4

Cheers for the posts.

Nick