Misfire on one cylinder

[Multij]

Hey Guys,

I have a problem with my 93' GT Turbo, it is misfiring and basically the car is permanently working on 3 cylinders and running very rich, compression is good, we replaced injectors, high tension leads, plugs, checked harness, and the problem still persists.

When unplugging the injector plug that is on the fuel rail on this particular cylinder the idle does not seem to waver, but on the others it does.

Did anyone encounter this problem? Maybe someone can shed some light?

Thanks.

[5e colin]

Test the injector and do a leakdown test mayby ringland or injector seals leak Al can contribute to amiss

[morgey]

Check/replace Dizzy cap and rotor arm, Ignitor, coil and Earths

I think the injectors are in 2 banks but could i be wrong on that.

[5e colin]

Check/replace Dizzy cap and rotor arm, Ignitor, coil and Earths

I think the injectors are in 2 banks but could i be wrong on that.

your right there in 2 banks but im on about the injector itselve not the electronic feed to them

[morgey]

He said he replaced the injectors though. That should have renoved or moved the issue i would have though?

[davehart]

Easy checks to see if its the injector, plug or leads:

if no change occurs when taking the fuel injector plug out do the following:

Put a long screwdriver on the injector and check for pulse.

if you do, check for spark so do this:

Take a spare spark plug. Take the lead off, put the sppre plug on the lead. Earth the plug, easy way is to hook up a jumper cable to the plug to the negative terminal on the battery. Start the car, check its firing.

They take the plug out the block, do the same with the plug, see if its firing.

I had a similar problem, turned out to be a non firing spark plug.