Mungus

Evening all,

Just about come to the end of my teather tonight.

A few weeks ago, I got an intermittent running fault with the car. Problem with this as you are all aware is that such a fault you can struggle to find.... until it packs in, which it has now!! It was litterally a case of parking the car up one night running fine, coming out in the morning with the fault - which now remains.

So you can start the car, but it runs almost like its on 3 or even 2 cylinders. It coughs, splutters and backfires through in let and exhaust, rev counter goes crazy, seems to loose ignition and then regains ignition. Car will not rev and will not drive.

As this is currently my daily, I ordered a sensor kit from MSD and took this as the opportunity to change them as a possible cause.

Coolant sensor (blue) - made no difference
ACT (black - MSD approved but not OEM) - no difference
Phase sensor (correctly gapped) - no difference
Crank position sensor (correctly gapped) - no difference

Changed the group A coil - no difference.
Confirmed spark at all 4 plugs/leads

I though this could be an ISCS valve issue ( I havent got a spare to rule out) Engine stalls immediately when sensor plug removed, where as I thought it should just drop the revs a little?

Please help!!

Cheers
Huw

martysmartie

iTrader: (1)

I never get why people change all the sensors!

In your case I would look toward the MAP sensor, first check the reference hose is connected properly and it is not split.

ISCV will never cause an issue like this, it merely opens to allow air to bypass the throttle.

Martin

Harris.

Weird my 3 door did exactly the same thing, parked it up and it was fine ,next day running on 2 and wouldnt drive...............i changed the ignition amp on the inner wing and it was perfect, see if you can use one off a mates car first just to be sure, i was lucky i took the one off my gf's saff just to test

Good luck

Mungus

Morning,

Thanks guys,
I changed the sensors because I had them 'on the shelf' - im using it as my daily and understand that these are prone to failure and can cause problems. I havent changed them in my ownership so didnt think it would hurt - in the long term, it could save me another breakdown lol!

Have another map sensor to try so will try that this morning.

Will keep you all informed!!

Cheers
Huw

DAN-Saff

Sounds like your Engine loom has a prob. Try moving the engine loom around while the car is running listening for a splutter or move the loom around a bit then try to start it.

It's prob around the inlet manifold where the loom bends over it.

Cossie Sean

check the engine earths also if rev counter is bouncing,

what does the temp gauge do when rev counter goes mad?

Dan had quicker finger than me

BRAM

iTrader: (1)

If your car is a 4x4 you could try checking the plugs on the bulkhead.

Mungus

Thanks guys, just changed the map sensor. No good.

Havent got a spare ignition amp to try - any way of testing it?

Bulkhead connections...... hmmmm, tell me more. Obveoulsy on the bulkhead.... where am I looking?

Cheers
Huw

DAN-Saff

I doubt that I just started earlier

DAN-Saff

Is it a 4x4? If yes you have 3 plugs above the cam cover that cause problems if 2wd there's no connectors.

Harris.

Do you know anyone that lives near by with a cosworth ? My gf's was a 4x4 and it worked fine on ther 3 door .

Mungus

Thanks to all.... and our winner is..... BRAM

Cheers fella. Disconnected all loom connections, applied some electrical cleaner, reconnected and im a happy bunny again!!

Thanks to all

Huw

BRAM

iTrader: (1)

Glad it's all sorted mate!!!