Pontiac Problems? Ask a Mechanic for Answers ASAP
hi, can you clean out the throttle body with carb cleaner and see if that helps ,it might be full of gunk/deposits .
spray it while its warmed up.
see if that helps .sometimes the throttle body has to be removed to clean it better ..jazzmaster ..
does this have a lot of miles on the motor ? and lack of power ?
I may be able to help you better with a phone call if you want
ok, you need to do a compression check on all the cylinders .
the timing chain could have jumped .the compression should read at least 120 on each , if you have low compression or good compression on some and low on others the timing has most likely jumped a tooth or more ..jazzmaster ..
have you taken the vacuum hose off the fuel pressure regulator to see if there is a presense of gas ?
ok, check that and check the spark as well.
I am not there so I have to go by what you tell me .
if it is hard starting it could be numerous things
also, what were the compression readings ?
that is kind of low and that will cause a motor to run bad/hard starting/lack of power and stalling .
that combined with how and when it gave you problems ,points to a jumped timing .
it can jump a tooth or two and still start and run(badly) .
I have seen this many ,many times over the years
the compression (normal) is around 180 .that would explain the problem you have ..jazzmaster ..
A low copression motor will be harder to start/run rough/lack of power stalling -do you have these issues with it ?
I tried to get back to you ,the internet was out and I didn't get back online until now --sorry ..
when this doesn't start back up after being warmed up .have you checked the fuel pressure ?
the fuel pressure should read 55-60 psi when you firdst turn the key to run (not crank /start .
also, you need to check the spark to at least 2-3 cylinders and also the fuel injector pulse on at least 1-2 injectors using a noid light that plugs into the injector connector ..
I need to know what is missing of these 3 things and if there is a check engine light on when running please let me know if there are any codes stored in the pcm ,,thank you ...jazzmaster ..
if the switch was an issue I would think that you would not have spark .
try spraying carb cleaner into the throttle body and see if it tries to start then ..
p.s. usually if it is a fuel issue the car may sputter
when it shuts off like you turned the key off ,its electrical ,and the crank sensor comes to mind ,,as you have changed other components that show the same symptoms ..jazzmaster ..
can you wiggle the key when it runs and ,the car acts like it wants to shut off ?
please make sure that you are not getting spark to the spark plugs ,before changing anything .
also, if you have a tach/rpm gauge in the dash ,see if that shows movement when you crank over the motor .usually that is a good indication of a bad crank sensor and that combined with no spark and possible no injector pulse ...thank you ..jazzmaster ..
I have seen the belts rip at the wiring before and cause no start situations .
but usually there is no spark or injector pulse .
try to see if it starts with carb cleaner or tries to start or will start and stall ..it may be an issue with no injector pulse ,if you have spark and fuel pressure ..
dont change the crank sensor(crankshaft sensor )
will this still start and run when it sits for awhile still ?
ok, after you check the resistance on the injectors ,please let me know what the resistance was ..
dont get any injectors .to check the resistance properly ,they all need to be disconnected
you have some lower resistance in some -any that are lower should be replaced .I have seen where a bad injector will take away from other injectors and even short out the others . you can hook them up one by one and see if the volts change as each is hooked up .as well /..