cerbera grief

[jesfirth]

help i have a 97 p 4.2 cerbie with a new bottom end rebuild, new ecu, coil packs, leads, plugs, air flow sensor, crank sensor and a disconnected immobilisor. It has recently had a bad misfire sorted. It feels sooo much quicker now it has been fettled but today went for a spin and it cut out after 1/4 mile. It restarts whilst backfiring and sounding awful works for a few seconds and then dies, especially if you rev it. It also has a hot start problem. Any bright ideas? ps it has not run out of fuel but is on 97 ron not optimax as usual.

[chris watton]

Hi Jes, I am sure a kind moderator will move your thread to the Cerbera forum, where ther will be lots of very helpful guys willing to help , Hope it gets sorted, must be a nightmare after spending all that ££ on new stuff for your car.

[jesfirth]

thanks

[trooper1212]

Sounds like a fuelling problem to me, either to lean or too rich. Why would it happen after a 1/4 of a mile? Depending on how long the car has been sitting in the sun, the 1/4 mile point could well be when the fans kick in. The fans draw a lot of power and a dodgy ECU can have problems working the mapping to compensate (as I found out over the past week with a lot of help from the Topcats guys) Mine resulted in the car flooding when I was in traffic, but nothing as catastrophic as yours.

Have you also checked the big fuse?

[jesfirth]

thanks whats the big fuse

[trooper1212]

80-100amp fuse that sits between the alternator and the battery. Directly behind the engine on top of the gearbox. I don't think this will be your problem, but it's a cheap part and has to be worth a go.

If you do a search on the forum there is a thread with a few pics of it in.

[kojak69]

jesfirth said:

thanks whats the big fuse

Agree with trooper1212. Dont think its your problem, but check it anyway. Its easy to check. Mine on the photo is knackered.


>> Edited by kojak69 on Sunday 8th August 09:58

[SXS]

Anyone installed a remote trip reset'able fuse here?

[jimbob2]

1. Check all your leads are seated tightly - mine have pooped off on occasions

2. Check that the metal "crimp" inside the end of the lead is giving a tight fit around the plug - this has also happened to me.

3. Check that the leads are not arcing e.g. spark is drawn to the engine block rather than the top of the plug - you'll probably want to do this at night - you shoul dbe able to see it sparking

4. Get some Magnecor competition leads.

All things I've discovered over the last year...

[jesfirth]

thanks all. I've checked everything suggested and no joy. It's being trailered to topcats tomorrow for a fix.