stumble and blinking ses.

[irish91983]

Just a little while ago my car started to stumble and the ses light stared to flash. It only stumbles when I get on it. Im thinking plugs or wires. Any ideas?

Thanks, Keith

[crash93ssei]

Flashing SES is usually (or always?) P0300 random multiple cylinder missfire. I would definitely do plugs and wires first and see if that cures it.

[bobgto65]

and if that doesn't work, it is likely a bad coil.

[Franksdad]

Happened to me was a misfire, was a bad plug.

[nos4blood70]

Go through your ignition system.

[00Beast]

I agree, check and replace the plugs, check and/or replace the wires, then if it's still there, time to check the coils and ICM. The flashing SES indicates a potentially catalyst damaging condition, which is usually some sort of misfire. Keep the plugs in order when you take them out, note if one is darker or lighter than the others. Light would indicate a lean condition, pitch black would mean very rich, that that plug isn't firing. Do you have access to a scanner to see which cylinder is misfiring?

[irish91983]

All 3 Coils And Icm Are Brand New. OnlyA Few Months Old. Plugs And wires Are About Due.

[00Beast]

What brand are they?

[irish91983]

I Believe They're BWD.

[Franksdad]

Dude you should definitely run a code reader to identify the misfiring cylinder, then swap the plug on that cylinder and see if it fixes the problem, it did it for me.

[irish91983]

Tested Coils Replaced Plugs And Wires. Still Have A stumble. Sprayed All Vacuum Lines And Intake No Leaks. If I DriveEasy It's Fine. When I Need Power It Stumbles. Could It Be A BoostProblem?

[gonzo4191]

how did you test the coils? a misfire can also be fuel related. are the wires routed properly

[irish91983]

First Thing I Checked And Rechecked And Checked Again Was The Firing Order. Used The Techinfo Guide ForThe Coils.

[irish91983]

When I scanned it I got a code p0300 misfire detected. Also had 2 stored codes for my map seneor and one for the tps.

[rfoster]

Test your TPS.... when mine was going bad, it stumbled, even at idle. But, regardless, all codes need to be addressed. If it is a MAF issue, don't buy a new one, just grab a used one from Haro. Less headaches. What brand of plugs, wires, and coils did you use?

[macksdaddy77]

i actually have this right now on my 02.. scanned it with torwue pro and found cylinder 5 misfire.. like everyone said check ur plugs and wires..

[irish91983]

Plugs and wires are brand new only 2 days old. Coils tested good. Icm and coils are only couple months old. Cleared the codes last night just scanned it now only getting a P0300 code. What else should I do? Also I don't have a cat and tps tested good also

[macksdaddy77]

injectors maybe.

[crash93ssei]

It doesn't matter if if the parts are right off the production line, they can be bad right then or only last for ten minutes, I have seen several plugs bad either right out of the box or within a couple days fail.

Is it misfiring at idle as well or only when under a load?

If you are very careful you can pull the wires off the coils one by one with the engine running and you will easily see and hear the spark jumping down the coil towers, that will verify that at least the coils are firing at idle.

[irish91983]

After retestingEverything And All Passed I Figured What The Hell Still Have My Old Coils Sitting And SwaP Them In And Hope For The Best. Yup It Fixed It Had A Bad Coil Even Thou They Tested In Range.