frebor72

Hi

this is my ever lasting problem. My car cranks för a long time when hot. But this year I’ve discover that it will start fine if you hold full throttle for two seconds and then letting thw throttle go. The temp sensor is fine and I’ve verified it by a computer. So far I’ve replaced:

injectors
ignition coil
Ignition module
starter
pich up coil
ignition cables
spark plugs
cap and rotor
battery

Also looked for fuel in the hose to the fuel pressure regulator. It’s dry

It sounds and smell that it gets too much fuel but I’ve tried to remove fuel by reprogramming the chip with no luck.
Is it possible that it gets too little fuel?
Any other ideas?

305tpi 1987

Tuned Performance

iTrader: (92)

Is the ninth injector still wired up ?

frebor72

No it’s deleted. Removed and plugged

Tuned Performance

iTrader: (92)

Holding your foot down sounds like to little fuel. The injectors are turned off in clear flood mode. Wich table did you pull fuel from ? Still $32B ?

frebor72

Still $32B. I pulled from crank fuel vs coolant temp or something like that. But I have not tried to add fuel.

Tuned Performance

iTrader: (92)

You might try reducing lower numbers in crank fuel multiplier vs reference pulses

frebor72

You mean to take out fuel amd simulate the thinh with the throttle? How many ref pulses is two seconds?

Tuned Performance

iTrader: (92)

Take out from zero to 8. 8 would be one engine revolution.

Tuned Performance

iTrader: (92)

Any progress, suggestion work ?

frebor72

After some further discussins and great support it seems to be the best idea to go back to an unaltered version of APYM. The most likely cause of this is mechanical problems. The major argument is that the car had this problem
when I bought it and I’ve tried different prom versions with the same result. The first owner have told me that this was not a problem in the beginning

SlowAndSteady

did you check fuel pressure ?

also : does the key on pump prime (Fuel pump Relais circuit ) work ?

Because if not, only thing that kicks on your pump is the Oilpressure switch and that thing on a worn engine takes a longer time if oil is hot and thin to build up oil pressure by only cranking