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1999 Pontiac Sunfire Starting Issues

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johnny72
User

Apr 26, 2014, 1:35 AM

Post #1 of 5 (2540 views)
1999 Pontiac Sunfire Starting Issues Sign In
I have a 99 Sunfire. It has a 2.2 engine with 160000 miles. First thing in the morning, it start as soon as you turn the key. After it gets hot, and it sits for a little while, it gets harder to start. It has to keep turning over for several seconds, before it will finally start. The hotter the weather is, the harder it is to start. I can sometimes smell fuel when it is having trouble starting. I have replaced fuel filter, and crank sensor, and spark plugs. The car runs great other than the starting issue. Thank you for any help that can be provided.


(This post was edited by johnny72 on Apr 26, 2014, 1:37 AM)


kev2
Veteran
kev2 profile image

Apr 26, 2014, 1:51 AM

Post #2 of 5 (2531 views)
Re: 1999 Pontiac Sunfire Starting Issues Sign In
Check for codes - even if the CEL is off...
do a fuel pressure test - also a leak down test looking for a leaking inj.
Check the ECT - basically what temp does the PCM see.

Hoping somethig above helps
next we would look at
SPARK at several plugs.....
Injectors pulsing....
with a scanner - Ft's etc.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 26, 2014, 2:11 AM

Post #3 of 5 (2526 views)
Re: 1999 Pontiac Sunfire Starting Issues Sign In
? Evap system trouble possible. See if just loosening and retightening gas cap makes this change it's hard warm/hot start behavior,


T



johnny72
User

Apr 27, 2014, 1:57 PM

Post #4 of 5 (2487 views)
Re: 1999 Pontiac Sunfire Starting Issues Sign In
I have checked for codes, none are showing. I did replace the ect sensor, no changes, checked the temp with scan tool, shows same as ambient temp. I have not done a pressure check, I am not sure how to without a schrader valve to hook up to. Thank you for your reply, and any other help that you can provide.


johnny72
User

Apr 27, 2014, 2:00 PM

Post #5 of 5 (2485 views)
Re: 1999 Pontiac Sunfire Starting Issues Sign In
I put a new gas cap on, and have tried loosening cap before I try starting the engine, it does not make any difference. Thank you for your reply, and any other help that you provide.





 
 
 






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