Why when I start the car does it turn over for ages, then eventually limp into life running really lumpy for a few seconds then clear and run even.....at the same time 'at start up' it reaks of fuel and drops an amount of fuel out through the join in the exhaust manifold under the center of the engine....

It seem to be only one cylinder thats being problematic & once its clear it runs perfectly......

spec: Simtek, 440 inj, high pres fuel pump & thats about it.....


Any info would be appreciated

 

faulty injector on one cylinder?

 

Could be where you have a slight fuel leak, it is allowing air to enter the fuel system somewhere and let the fuel drain back to the tank. In theory you are bleeding the air out every time you start the car, hence the time it takes to fire up.

 

Possibly the ecu temp sensor. Very odd for fuel to leak from the exhaust. I guess you also have the headers blowing which wont help with the way it runs

 

I doubt it's a fuel leak as you would have a constant smell of fuel. It's not like a diesel system where the spill returns can seep and then take in air. The system is pressurised the moment you switch the ignition on as the fuel pump primes the system.

By the sounds of it you have an ignition problem. One cylinder is either no spark or weak enough to not allow the fuel air mixture to ignite properly as the fuel system will be on cold enrichment.

Is it running coil per cylinder or a single coil pack?

 

Its a coil per cylinder.......

 

The early ones are prone to cracking at the tip (under the rubber bit) Pull them off and check they all work and aren't tracking.

 

Another possibility is the crank sensor or cabling to it. I believe it is only used to confirm rotation when starting. The ecu relies on the cam sensor thereafter so the engine will run normally once started. Someone will correct me if I am wrong

Whatever it is good luck fixing it

 

+1 I have a car in at the moment which struggles to start, once it does it runs lumpy for 4-5mins the runs spot on all day. Fault code is 21 which surgests engine temp sensor

 

Good point, have you checked for fault codes?

 

Ask whoever fitted your Simtel to look at the cold start and cure or ID the problem.

 

mine did the exact same poped and banged was temp sensor

 

yeah i had the same problem temp sensor to but i would check your injectors and re-seal your exhaust flange with a new gasket ,if you get it plugged in and get your live data read you will see if your temp sensor is within it peramiters good luck

 

i would whip ya plugs out aswel mate see if any are wet could be a duff plug or coil pack

 

Its going in to RCM shortly to be checked & set up ;-)
thanks for the input guys......