Hi All
I’m new to the forum. My wife and I have a Plus 4 from 1991 with the M16 engine. We have an issue where we need to crank it to start first time (it runs for a second and dies otherwise), then once running cold it wants to die. Once warm it will run better, but leave it off for a few minutes and it need cranking again. If you stop the car and start again straight away it will fire up and continue to run. Even when warm there is a hesitation up in the revs, I can always find it at 2600rpm. I have already checked a lot out, the list below doesn’t include the things I checked before perhaps replacing them anyway and I might have missed some things off. The only item I haven’t managed to check is the fuel management ECU, I only recently realised that existed as I thought the programmed ignition system did all the work…
I have new injectors to try but I don’t think it will be that with what I have done with the existing ones. Does anyone have any other suggestions or know where I can get another fuel management ecu? It’s specifically the 14CU mkc10053 80203A.
- [x] Drained fuel, cleared the lines with new fuel and changed fuel filter.
- [x] Intake lead off of airflow sensor made no difference
- [x] Fitted new seals to injectors
- [x] Cleaned throttle plate
- [x] Fit new vac hoses
- [x] Changed distributer cap
- [x] Changed rotor arm
- [x] Clean crank position sensor
- [x] New crank position sensor
- [x] Crank position sensor checked via fast check tool at programmed ignition lead.
- [x] Check knock sensor via fast check tool at programmed ignition lead.
- [x] checked the fuses (taken each one out and put it back on)
- [x] changed the relays
- [x] Check fuel pressure
- [x] Check fuel pressure when cranking
- [x] Coolant temp sensor checked
- [x] Coolant temp sensor changed
- [x] Coolant temp sensor checked at Ecu plug
- [x] Coolant temp checked via fast check tool at programmed ignition lead.
- [x] Throttle position sensor checked with clean sweep on voltage
- [x] Cleaned injectors in a ultrasonic bath and cleaned through with carb cleaner (jet looks ok)
- [x] Engine cranked with fuel rail off and pointing into bottles to check operation.
- [x] Checked for air leaks using smoke machine. One tiny leak near throttle position sensor, not thought to be the issue.
- [x] New idle control valve fitted
- [x] Changed spark plugs.
- [x] Replaced coil
- [x] Checked HT leads
- [x] Changed HT leads
- [x] Check voltage drop to earth on engine
- [x] Voltage to coil from ignition checked
- [x] Programmed ignition swapped for another.
There isn’t a lambda sensor.
There is beers or another gift if someone can help me fix the issue.
Cheers
Ben
