Car Won't Start When Warm

[LoveX1/9s]

hmm. I am thinking cold start injector issues. If cold start injector not functional, won't cold start [it is the "choke" on injected cars]. If cold start was failing for a while - perhaps it was operating when it should not = flooding when hot and hot start problems. I would check electrical and fluid connections to cold start injector and after that, the box of smoke.

Box of smoke?

 

[Steve Thomas]

Box of smoke

the box where the smoke is kept. You know, when the smoke gets out, the electronics no longer works.... Any ECU.

 

[kmead]

A smoke test to assure there were no leaks in the vacuum system.

A vacuum leak is not what is keeping your car from starting. The components which rely on the vacuum are minor and would have no effect on the car starting or not.

If your intake snorkel hose from the AFM to the intake manifold is in good shape (which means taking it off and verifying it isn’t cracked). This hose being cracked could keep the car from running properly, the engine should start regardless of the quality of the hose (running properly would be another matter).

Dan is speaking of printing out the test procedures from here: https://xwebforums.com/wiki/index.php?title=FuelInjectionTroubleshooting
You can also download a cleaned up version at MiraFiori.com where you will need to make an account to access the file in their Library: https://mirafiori.com/forum/download/file.php?id=13098 the file is too big to attach to this post.

 

[LoveX1/9s]

A vacuum leak is not what is keeping your car from starting. The components which rely on the vacuum are minor and would have no effect on the car starting or not.

If your intake snorkel hose from the AFM to the intake manifold is in good shape (which means taking it off and verifying it isn’t cracked). This hose being cracked could keep the car from running properly, the engine should start regardless of the quality of the hose (running properly would be another matter).

Dan is speaking of printing out the test procedures from here: https://xwebforums.com/wiki/index.php?title=FuelInjectionTroubleshooting
You can also download a cleaned up version at MiraFiori.com where you will need to make an account to access the file in their Library: https://mirafiori.com/forum/download/file.php?id=13098 the file is too big to attach to this post.

Thanks... One owner stated that his car started he fixed the vacuum leak but I can see how it would have to be major for that to happen.
I have pulled a ton of grounds off the car that previous owners have installed. It could be a separate problem but lately my clock has to be reset every time I start the car.

But now I have a plan of attack. I’ll be busy for a while but you’ve provided the best way to sort things out… Much appreciated.

 

[LoveX1/9s]

So, I started with the spark test and after replacing the typical electrical stuff, the car has started every time. In addition, my clock also no longer needs to be reset an the dash board lights have brightened up for the first time in a while. I got the car with dim lights 10 years ago. Previous owners have been creative with ground wires - since removed so someting is drawing on the electrical system. That said the line to number 4 was cooked and lots of dust came out after I disconnected the plug. I am going to continue down the list. Will get to the oil pressure test but I have oil on the spark plug threads so I suspect I will do a before and after test after that's addressed. I will get the UV oil to see where the leak is coming from.

 

[kmead]

So, I started with the spark test and after replacing the typical electrical stuff, the car has started every time. In addition, my clock also no longer needs to be reset a the dash board lights have brightened up for the first time in a while. I got the car with dim lights 10 years ago. Previous owners have been creative with ground wires - since removed so someting is drawing on the electrical system. That said the line to number 4 was cooked and lots of dust came out after I disconnected the plug. I am going to continue down the list. Will get to the oil pressure test but I have oil on the spark plug threads so I suspect I will do a before and after test after that's addressed. I will get the UV oil to see where the leak is coming from.

Great plug wires available from RX1900 I have them on both my X’s

High quality and the right lengths.

 

[JKIDD]

Great plug wires available from RX1900 I have them on both my X’s

High quality and the right lengths.

+1 on these. I installed mine a few months ago.