93 Grand Prix Posted March 8, 2003 Report Share Posted March 8, 2003 Could all of my problems be caused by a Transmission vacuum modulator? I hear somethin ticking or frying when I turn the car off. I also see bubbles on the transmission fluid check stick. I can see a small leak from under the car, right behind the radiator. This would cause a few of my problems (bold) 1. engine hard to start when cold 2. engine lopes while idling 3. engine idles erratically 4. engine misses at idle 5. excessive fuel consumption 6. cooling fans won't come on 7. bad fuel odor 8. no power in 4th gear http://www1.autozone.com/servlet/UiBroker?ForwardPage=az/cds/en_us/0900823d/80/04/ce/5b/0900823d8004ce5b.jsp Quote Link to comment Share on other sites More sharing options...
JS91Z34 Posted March 8, 2003 Report Share Posted March 8, 2003 Yes that could be part of your problem except for the no power in fourth. The other three yes because the vac. modulator works off of vacuum. What all have you replaced on your car so far if you dont mind me asking? :?: Quote Link to comment Share on other sites More sharing options...
GrandPrix34 Posted March 8, 2003 Report Share Posted March 8, 2003 TIMING BELT check the timing belt!!! Quote Link to comment Share on other sites More sharing options...
JS91Z34 Posted March 8, 2003 Report Share Posted March 8, 2003 yes definitely check your timing belt if that is fine, check your cam timing and make sure you dont have a cam or two a tooth off! Quote Link to comment Share on other sites More sharing options...
GrandPrix34 Posted March 8, 2003 Report Share Posted March 8, 2003 welcome to the board JS91Z34!! Quote Link to comment Share on other sites More sharing options...
93 Grand Prix Posted March 8, 2003 Author Report Share Posted March 8, 2003 What all have you replaced on your car so far if you dont mind me asking? I have already replaced multiple things on this car. 1. Coils 2. Coil module 3. Spark Plugs 4. Wires 5. Coolant temp. Sensor (twice) 6. relays 7. water pump 8. oxygen sensor 9. cleaned throttle body intake 10. pcv valve 11. ECM 12. plenium gasket 13. 2 cans of carb. cleaner looking for leaks 14. tranny fluid flushed 15. EGR valve 16. IAC motor 17. lots of time and money Quote Link to comment Share on other sites More sharing options...
Brian P Posted March 8, 2003 Report Share Posted March 8, 2003 Christ almighty it has the 3.1 and you are suggesting the timing BELT?! Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted March 8, 2003 Report Share Posted March 8, 2003 TIMING BELT check the timing belt!!! Ugh, me thought he has 3.1? 8) Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted March 8, 2003 Report Share Posted March 8, 2003 Christ almighty it has the 3.1 and you are suggesting the timing BELT?! You beat me by one minute :oops: Quote Link to comment Share on other sites More sharing options...
Brian P Posted March 8, 2003 Report Share Posted March 8, 2003 LOL! Quote Link to comment Share on other sites More sharing options...
GrandPrix34 Posted March 8, 2003 Report Share Posted March 8, 2003 belt, chain, whip, string, thread, yarn, telephone wire, shoelace, speaker wire... hope i have "pleezed" everyone Quote Link to comment Share on other sites More sharing options...
JS91Z34 Posted March 8, 2003 Report Share Posted March 8, 2003 oops thought he had the 3.4L :shock: :oops: Quote Link to comment Share on other sites More sharing options...
JS91Z34 Posted March 8, 2003 Report Share Posted March 8, 2003 thanks G.P. 34 Quote Link to comment Share on other sites More sharing options...
eclipse5302 Posted March 9, 2003 Report Share Posted March 9, 2003 Best way to check the trans modulator is to take the vac line off of it and look for trans fluid. The line should be bone dry. When the rubber diaphrams go bad in the trans moduator, the engine vac sucks trans fluid into the intake and the engine burns it. It can cause drivability problems. But the trans will shift strange also, and you'll be losing trans fluid even though it doesn't leak. Jason Quote Link to comment Share on other sites More sharing options...
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