GMC envoy 2002 rough idle oil pressure rising when accelerating

Asked by Jul 06, 2017 at 01:43 PM about the 2002 GMC Envoy 4 Dr SLT 4WD SUV

Question type: Maintenance & Repair

Anyone have a answer on this, my GMC Envoy has
a rough idle almost like it's going to shut off at at a
red light. And also when I accelerate away from
any stop the oil pressure goes up and my check
engine light starts blinking but only at a higher
speed anytime I hit about 45 MPH, any other time
to check engine light just stays on this problem
just started this morning

9 Answers

385

You have the I6 engine? Did you recently unhook the battery for any reason? Oil pressure will always rise when you accelerate, this is normal.

385

Oh, have the code scanned at like an Autozone and report back what the code is. Don't drive it with the check engine light blinking, that's a good misfire.

2 people found this helpful.

Thanks.. taking it to shop shortly.. Will have them scan an get back to with you..

An no unhooking of battery recently at all..

Thanks.. taking it to shop shortly.. Will have them scan an get back to with you..

So cylinder 2 is misfiring mechanic tells me he thinks it's a coil pack that sound about right there anybody

385

Yep, exactly the symptoms of a coil going bad.

385

Pretty easy to do it yourself, I can walk you through it if you want. BUT to make sure it's the coil, you'd need a scanner. Basically switch coils with another cylinder and see if the code follows to the other cylinder. If he unhooks the battery and you have idle problems again, report back. It's a $9 fix.

I’m having the exact same problem, did you figure out what it was?

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