Multiple misfire in 97 camaro
#1
Multiple misfire in 97 camaro
My camaro is throwing a multiple misfire and flashing check engine light, I’ve changed the sparks and wires, the ignition coils, the fuel pump and filter, it will randomly run fine then seem to lose power and get it back again it’s a Manual transmission
#2
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,352
I assume since its a 97 and you said coils that this is a 3800?
Does the the miss fires point to a specific cylinder? Certainly sounds like an engine analyzer with a built in scope would point out the issue. ICM and MAF sensor are also likely problems or the connectors leading to them. With a 20+ year old car connectors can become issues.
Does the the miss fires point to a specific cylinder? Certainly sounds like an engine analyzer with a built in scope would point out the issue. ICM and MAF sensor are also likely problems or the connectors leading to them. With a 20+ year old car connectors can become issues.
#3
I assume since its a 97 and you said coils that this is a 3800?
Does the the miss fires point to a specific cylinder? Certainly sounds like an engine analyzer with a built in scope would point out the issue. ICM and MAF sensor are also likely problems or the connectors leading to them. With a 20+ year old car connectors can become issues.
Does the the miss fires point to a specific cylinder? Certainly sounds like an engine analyzer with a built in scope would point out the issue. ICM and MAF sensor are also likely problems or the connectors leading to them. With a 20+ year old car connectors can become issues.
#4
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,352
Sorry can't help with where to take, if you still have cars shows or cruises you could ask the people there. Most shops that decent will have an engine analyzer. Dealership would have on but that does not mean the mechanic know you 18 year old tech very well.
You could try a tap test on the MAF sensor, with the engine running at idle tap the MAF sensor with the handle of a screw driver and listen for a change in the engine. You can do the same thing wiggling the wires to the MAF and the ICM. If you hear the engine change something is not right.
You could try a tap test on the MAF sensor, with the engine running at idle tap the MAF sensor with the handle of a screw driver and listen for a change in the engine. You can do the same thing wiggling the wires to the MAF and the ICM. If you hear the engine change something is not right.
#6
UPDATE: so I was able to replace all injectors and hooked her back up and she is giving me NO pressure. There’s no gas leak and I hear the NEW pump starting up but when I check on the Schroeder valve it guzzles Out showing weak pressure so my question is, before starting the swap for the injectors my pressure was prefect now my car won’t start up, any ideas where I messed up? Could it be the fuel relay?
#7
run power to the service/prime wire for the fuel pump so you can manually turn it on. does it look like there is air in fuel. maybe try an unhook fuel line at the fuel rail or fuel filter and run pump to make sure you are getting good flow to that point. take filter off and see whats in it if anything and make sure its not plugged with something.
#8
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,352
If you hear the pump and have no fuel pressure and no visible leak it pretty much needs to be an issue with the pump.
Just a FYI, I put three airtex pumps in my 96 before I got a good one. One left me sitting in rush hour traffic after just 2 days of being installed.
Just a FYI, I put three airtex pumps in my 96 before I got a good one. One left me sitting in rush hour traffic after just 2 days of being installed.
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