Sr20fd3st

Only recently, i'v been having this lame hot start issue occur.

1. compression numbers are all above 100 psi
2. did a charging system test and everything checked out fine
3. i had a code 23 and 25 for the fuel thermosensor and prc (pressure regulator control) solenoid. i had removed the solenoid during the simplification proccess but decided to hook it back up to see if it would fix it. i guess when the thermosensor reas hot enough fuel temps it adjust the valve in the solenoid to allow less vaccum to the fuel pressure regulator, meaning more fuel pressure. the FSM states that this is what it does to combat hot starts and vapor lock. i got the system working but the hot start still persists. i even tried taking the va line off of the FPR during a hot start moment but it didnt work, even tho that would replicate full fuel pressure.
4. Then the next day my car stalled when my fans kicked it. the fans turned on and then my idle dropped to about 450-500 then eventually it died.
5. I have the airpump removed.
6. I read somewhere that harness to the starter was supposed to be replaced with an updated version because it wasnt designed right and when the harness got hot the resistance got so high that the starter didnt get full voltage untill everything cooled down.
7. when it's cold it starts just fine
8. I dunno wtf to do now. it just started happenening out of nowhere. never happened to me in the hottness of summer.
ANYONE PLEASE HELP

Sr20fd3st

bump please

Sr20fd3st

Also what i fidn strange is the engines urge to stall out after it warms up for a few its very odd. when i first start the car in the morning, and either turn the wheel or turn on the lights, the idle goes up like its supposed to to compensate the load. after about 15 minutes of idleing and a drive around the block, the compensation seemed to stop working. i turned the wheel and the idle dropped to about 600, and when i flipped my lights on the idle when below 500 and the car died. i put the pedal to the floor when it hit 500 but it didnt react it just died as if it just lost all power. anyone?

Mahjik

iTrader: (1)

Did you fix the Fuel Thermosensor code?

Did you actually test the PRC solenoid to verify that its actually working?

Sr20fd3st

i did check the solenoid and it is connected correctly. the connected broke off of the fuel thermosensor however so the CEL is constantly on now. i will have to get another one . i still don't understand why the load compensation stops working after a its been running for a while. does the thermosensor actually control duty cycle of the injectors to control the ammount of fuel based on the temp/density of it? or does it only control the cycle rate of the solenoid to control fuel pressure?

Sr20fd3st

also, if the PRC solenoid was this important to the hot start function, howcome is it always suggested that it be ommited during the vacuum simplification process? its absence never gave me any problems before recently

Mahjik

iTrader: (1)

Did you work through the troubleshooting section in the FSM?

Basically, they list three things to check for your situation:

* Fuel Thermosensor
* PRC solenoid
* Purge Control solenoid

Having the solenoid connected doesn't mean the solenoid is working properly. You'll need to test them. BTW, you have tested your electrical system as well I assume (i.e. battery, alternator)?

Str8Down

FPR itself could be bad as well. It could not be holding the stock 38 psi of fuel pressure. I would put a fuel pressure gauge on you car, even if just temporary to see what the fuel pressure is at idle.

Sr20fd3st

well i think i found the reason why it runs like ****. i shouldv done the compression test first thing.... 50 psi on all surfaces on both rotors. seems kinda weird that they all came out to exactly 50. all you do is pull the valve out and crank it with the throttle open right? just like any other compression test. and it doesnt matter if both front and rear plugs are out at the same time?