IronOutlaw
08-14-2009, 01:54 PM
Ok, Im trying to help my buddy get his car fixed. He brought it to a mechanic (http://mustangforums.com/forum/4-6-modular-mustang/556468-weird-problems-no-crank-sometimes.html#) and they cant seem to find out whats wrong with it but "fixed" some other things that ended up being over $400.
Its a 99 GT automatic. Sometimes for no apparent reason the car decides not to crank. Starter turns over fine, fuel pump (http://mustangforums.com/forum/4-6-modular-mustang/556468-weird-problems-no-crank-sometimes.html#) kicks on (I havent checked fuel pressure yet), but I think its getting fuel (http://mustangforums.com/forum/4-6-modular-mustang/556468-weird-problems-no-crank-sometimes.html#) due to the smoke it pumps out after it finally cranks.
Its not throwing any codes. I assume its not getting spark.
When the car finally cranks, which sometimes you have to wait for over an hour for it to, it revs up to 1500 rpms and then back down over and over (The AC is not on when it does this). Then if you put it into reverse it dies and doesnt want to crank again...put it in drive it will pull away and run fine. It runs perfect going down the road and is as fast as a stock 4.6 can be.
Mechanic wants to replace the PCM and the coil pack which is gonna be big money. Anyone have any ideas or had something like this happen before?
Also, another problem he has is sometime when going down the road in OD it will just start revving freely like in neautral, he has to put it in neutral and then back into drive to make it go again. Sound like a linkage problem?
Its a 99 GT automatic. Sometimes for no apparent reason the car decides not to crank. Starter turns over fine, fuel pump (http://mustangforums.com/forum/4-6-modular-mustang/556468-weird-problems-no-crank-sometimes.html#) kicks on (I havent checked fuel pressure yet), but I think its getting fuel (http://mustangforums.com/forum/4-6-modular-mustang/556468-weird-problems-no-crank-sometimes.html#) due to the smoke it pumps out after it finally cranks.
Its not throwing any codes. I assume its not getting spark.
When the car finally cranks, which sometimes you have to wait for over an hour for it to, it revs up to 1500 rpms and then back down over and over (The AC is not on when it does this). Then if you put it into reverse it dies and doesnt want to crank again...put it in drive it will pull away and run fine. It runs perfect going down the road and is as fast as a stock 4.6 can be.
Mechanic wants to replace the PCM and the coil pack which is gonna be big money. Anyone have any ideas or had something like this happen before?
Also, another problem he has is sometime when going down the road in OD it will just start revving freely like in neautral, he has to put it in neutral and then back into drive to make it go again. Sound like a linkage problem?