haveing idleing issues

[lou schmouder]

My car is dies upon cold start. Isc works fine fpr is at 37.5 reading 12-13 on wide band . Does fine after I crank it a few time and it gets warm. Any ideas???? Also no boost leak and rebuilt tb..

 

[StephensToySpyder]

what maff are you running? and did you do a compression test? do you have to pump the gas to start the car?

 

[dfwdsmer]

Do you have a aftermarket afpr? Sometimes they won't hold pressure in the lines. This results in more cranking to start, or using link to activate the pump before start up.

 

[eclipsyco]

Fuel pressure for 2g should be at 43 psi is there any reason your set up yours like that?
At cold start the ECU adds more fuel to the mixture to warm up...

 

[lou schmouder]

gm maf. Good compression across the board. Yes aftermarket fpr. Its not once or twic I have to crank it 10-15 time till it hits about 150 then its fine after that. New plugs also. after its warm no issues at all

 

[dfwdsmer]

When you shut the car off does the fuel pressure instantly drop?

 

[lou schmouder]

nope stays at 37.5 even a few sec after it dies

 

[dfwdsmer]

Coolant temp sensor perhaps.

 

[lou schmouder]

brand new. How would that play a role in it keep dieing ????

 

[StephensToySpyder]

try to turn your fuel presure down to 29 psi,

 

[dfwdsmer]

If the sensor is bad it will send
the ECU a negative signal then the ECU will dump
craploads of fuel and the car will
either have a very hard time
starting or won't start at all.

In the first post you stated your WB reading of 12-13 which is rather rich.

 

[lou schmouder]

is 29 lbs safe??? think it working bc its new and when it gets warm its 13-14 on wb....

 

[StephensToySpyder]

yah,i always run 29-31 psi at the fuel regulator

if you dont see a change , then just turn it back up to where you had it set

 

[lou schmouder]

anyone else whith any input

Any one??

 

[StephensToySpyder]

Check for loose wires or vacuum hoses which may have leaks or worn out.You may want to check your battery. It should have at least 12.7v to get better starts. You may also want to try to jump start the car by connecting it to an idling car with a jumper cable. If it starts right away it may be a weak battery .If the problem still persist it may be a weak starter since it is harder to start a car in the morning. Other than that it could be a weak fuel pump