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Originally Posted by matt_77
I got the ECTS from NAPA, I've already checked for spark, that's why I replaced the coils and ignition control module. Now it has spark all the time. Checked the injectors last night, all are working.
I spoke with a mechanic last night and he had a saturn with the same problem. It turned out to be worn intake valves. I will check those out tonight. If that turns out to be the problem I will repost and let everyone know. Thanks for your advise saturnspeed_12.
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How many miles.
When you replaced the ects did you check the connector? They can become corroded if the old sensor cracked.
Backfiring thru the throttle body is a tell tale sign of a bad intake valve. It can also be from a lean condition. Pull a plug after trying to start it for a bit. Is it fuel soaked, carbon covered, or dry? Should give a clue. If it is dry check the throttle position sensor. It could be telling the PCM the pedal is to the floor and to go into clear flood mode.
Let us know.