has been runing rough for a couple of days and finaly shut down it is losing coolent so i checked the plugs they dont seam to be wet any ideas on what it could be seem to have fuel presure not sure what else to check 99 3800 gt
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02-08-2009
has been runing rough for a couple of days and finaly shut down it is losing coolent so i checked the plugs they dont seam to be wet any ideas on what it could be seem to have fuel presure not sure what else to check 99 3800 gt
02-09-2009
How does your oil look. If you are loosing coolant, you could most likely have a bad lim and it's leaking into your oil.
02-09-2009
Lets clarify a little on this one.Originally Posted by BADAZGTP
It's possible that you have a bad lower intake manifold (LIM) gasket or it could be the upper intake manifold that needs to be replaced. The Naturaly Aspirated (N/A) 3800 has a plastic upper intake manifold and is known to crack around the TB area; causing coolant to leak into the engine.
It is a good idea to check and see if there is a milky film on the bottom of the oil cap. If present, this would indicate moisture in the oil that could be the coolant that you say is missing and could support the idea that you have an internal coolant leak.
My suggestion would be to not jump to conclusions as what you are describing is very general and could be two seperate problems. To diagnose the coolant leakage/usage get a coolant pressure tester and check to see (if possible) where the coolant might be leaking from. Next, you say that "seem to have fuel presure," how do you know that you have pressure that is with in specs? Did you use a fuel pressure tester?
Let us know how it goes.
Last edited by Blown97; 02-09-2009 at 12:18 PM.
02-09-2009
Good deal. Thanks for going more in depth with it.
02-14-2009
well still wont start getting a tester to check fuel presure i can get fuel from the sharter valve after i turn the key on and here the pump prime up put in new plugs and wires no diffrence dose this car have a timing belt or a chain could this be the problem?
02-14-2009
oil is good no water sines no moister in oil cap could thisbe coil packs? but would they all go at once seemes canda odd i dont seem to get any fire any where have checked all fuses they are good. considering sending to junk yard not sure if its worth putting anymore money in it
02-14-2009
It's a long shot, but could be your ICM(ignition control module). I cought mine on it's way out when I was getting random stalling. If you have a scrape yard around, check and see if they have any GP's that you could get one off for cheap and try. I'd do that before you shell out the $$$ for a new one. They're about 130 bucks new.
02-15-2009
wheres the icm located at
02-15-2009
It's what your coil packs bolt to. When you unbolt all 3 packs, it'll come off and then all you have to do is unscrew the bolt in the harness running to it.
02-15-2009
tried starting fluid still wont start will look for a icm tomarrow could it also be the cps and where is it located? thins about to drive me crazy
02-15-2009
I haven't heard of the cps keeping it from starting at all, usually after it sits for a bit, it'll fire up. But, it's always a first for everything. I believe it's only like a $30 dollar part, so that wouldn't be to bad if you replaced and it was not it. I know it sucks though replacing parts and the problem not getting fixed. Happen to me with the ICM. Replaced a bunch of other junk until someone mentioned that.
02-19-2009
well still dead put a new ICM and coil packs on still no fire gona try the CPS tomarrow if that dont work not sure what to try next still no codes other then 3& 6 misfire prior to stalling local machanic thinks it is the cps
02-19-2009
Hope that's it. I hate playing the guessing game when it comes to this stuff. I've had to do it on mine before and sure it won't be the last.
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