• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Flasing Check Engine light

M

mrfreez

New member
Hey all. It's only happened twice. I floor it accellerating on the highway and the check engine light flashes for a minute. Then it goes out and everything is normal. It sputters too when I was flooring it. My code scanner only reads codes that are current.

Now, I'm wondering if it could be the spark plugs and wires. I just got them today and I'm putting them in tomorrow. The car has a new fuel pump, gas tank, filler neck, Supercharger oil has been changed and the cat is gutted. I'm wondering if there is anything else I need to check that could cause the symptom I described.
 


You bought new plugs and wires...but you haven't put them on yet?

Check back after you change them.
 
That sir, is common knowledge..

Flashing SES light = a misfire.

Changing the plugs/wires usually fixes it..If it doesnt then dig a little farther...might be a bad coil-pack (What happened to me) or even the ICM...

Change the plugs and wires, and be like "damn that was an easy fix"
 
machinegunsquid said:
That sir, is common knowledge..

Flashing SES light = a misfire.

Changing the plugs/wires usually fixes it..If it doesnt then dig a little farther...might be a bad coil-pack (What happened to me) or even the ICM...

Change the plugs and wires, and be like "damn that was an easy fix"
Click to expand...

Correction.... FLASHING ses = MULTI misfires.
 
bluegtp91 said:
You bought new plugs and wires...but you haven't put them on yet?

Check back after you change them.
Click to expand...

Well, I picked them up after work and it's already dark out lol. Thanks for the input guys. So ICM, MAF or bad coils if the new plugs & wires doesn't fix it up.
 


Flashing check engine doesn't mean misfire guys.

The FSM states a flashing check engine light means "Possible catalyst damaging condition". Which..yes most of the time is a serious misfire. however..technically it's not just possibly a misfire. It's a really badly running motor.

As for not changing plugs because it's dark, now you gotta do something spectacular to get our respect. Like buying a flashlight and doing the plugs tonight. :th_biggrin2:
 
Nope! I'm off to the autoclub tonight and changing the plugs with lots of light and where it's dry too!

15.jpg

14.jpg

13.jpg


Maybe this will impress you? Here's my Camaro build:
My 95 Camaro 3.4 Build Thread! - Camaro Forums - Chevy Camaro Enthusiast Forum
 


Nah, I'm just extremely lucky to have a place like this I can work! This place has saved me sooo much money in car repair it's not funny! I'm re-inforcing the frame of the Camaro over the winter and rebuilding the engine so that's where the camaro will be for the duration of the winter too. I just hope I can get the bugs out of the GP so I can replace the steering shaft in my wife's 03 Grand AM!
 
Last edited:
Well, changed the plugs and wires tonight. Had 2 broken wires and 2 coil pack terminals rusted badly. The plugs weren't too bad. Looks like the previous owner changed the plugs but not the wires! So, I sanded the terminals and changed all the plugs and wires. Plugs are laser iridium gapped at 0.60. So far the car seems to run better but I'll give it a better test on the highway tomorrow!

Here's the old plugs:

sparkplugs.jpg
 


Hopefully you didn't get the same "screw me up" plugs. If you did..pull them and crimp the ends so they don't loosen with heat cycles and cause you KR that drives you to the brink of nuts.

Not that I'd know from experience..but it's a serious ledge at that brink :th_wtf:
 
BillBoost37 said:
Hopefully you didn't get the same "screw me up" plugs. If you did..pull them and crimp the ends so they don't loosen with heat cycles and cause you KR that drives you to the brink of nuts.

Not that I'd know from experience..but it's a serious ledge at that brink :th_wtf:
Click to expand...

Like you I picked up on that pretty quick too! A pair of needle nose pliers did the trick. NGK plugs are all the "screw me up" plugs!
 
You must log in or register to reply here.
Back
Top