200FT Hard cold start. Pulls like a train when warm.

[Danders]

Hello all.

I've been nudged in your direction by a friendly chap at my local dealership. Maybe in sharing my story it might prompt some new ideas.

Ive done a fair amount of work so far, mostly suggested from other posts on this forum (thanks for that) but I'm still plagued with a cold start issues.

The problem - Will sit on the starter for minutes (!) stumbling and firing on one or two cylinders. Eventually it will catch and sit at a lumpy idle before warming slightly then purring like a kitten. I imagine in this time its hitting closed loop and sorting out the fuelling.

Some more notes;

- no fault codes
- has been going on through several tanks of fuel
- warm restart is fine
- had complete new (Bosch) ignition system from coil to plug (no improvement)
- checked fuel pressure regulator by reading rich-lean voltage swing on lambda when applying mityvac to the FPR vac line
- fuel pressure reg doesn't leak through vac line
- checked for air leaks on all vac lines
- fixed poor engine earth
- throttle position switch is adjusted properly at idle
- checked engine coolant temp resistance at cold and hot on back of ECU plug
- tried mate's ECU (LH jetronic 2.4)
- tried mate's MAF
- tried mates fuel pump relay
- new crank position sensor
- can smell fuel and have spark
- timing appears good
- injectors don't appear to leak
- starts on the button when warm


If anyone has any hints or can re-kindle my love for this car then please drop a reply!

Regards.

Andy