2006 impala 3.5 engine rpm not working running rough


Asked by Bryant313 Nov 14, 2020 at 09:15 PM about the 2006 Chevrolet Impala 3.5L LT FWD

Question type: General

2006 impala 3.5 engine hard to start when start rpm not working ive changed
camshaft sensor brand new.....new but used ECM and new but used engine
wire harness still running rough like i havent did anything

20 Answers


Crankshaft position sensor reads rpm....could also be causing the hard start

1 people found this helpful.

I’m sorry I didn’t change the camshafts sensor yet .. I met to put crankshaft.. I replaced it with 2 new ones and still the same


Well, given the new info, I'm assuming that you've already checked the fuses?

1 people found this helpful.

Nope not yet .. I was going to in the am .. and it’s weird ..I was driving the other day after I replaced the crankshaft sensor .. it was running rough .. it cut off while I went in gas station.. came back out started it and it rain perfect.. went home cut it off and started it back up running rough again .. that’s what made me change the harness but still the same


In some vehicles rpm gauge is read by the cam sensor, but normally it is the crankshaft sensor....as for rough idle, might try cleaning the throttle body and idle air control valve and see what that does....note cam sensor can also be a factor

1 people found this helpful.

Ok I’m going to try the cam sensor .. that’s the only thing left .. note the rpm was back working when I came out of the gas station.. .. soon as the car started running rough again .. the rpm was not working .. but I cleaned the throttle body before but I’ll clean it over as well as the idle air control valve to


Let me know what you find out, I'll try to figure out more possible causes in case it doesn't work


Hey so i ended up going to the yard and getting a variable timing solenoid ...couldnt find a cam sensor on this 2006 impala 3.5 engine ..intstalled it and same problem ...i end up checking all of the fuses and they all where good ..im losed at this point


Auto parts store should have the cam sensor for roughly $25-30

1 people found this helpful.

See if you have a relay for a nonessential system to temporarily replace pcm relay


Not used to seeing one without....what's your engine compartment fuse box look like?


I think I did but I will try tomorrow.. I’m in Michigan we had a bad storm lost power for tonight

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