misfires

[quicksilver]

I am having misfires while im driving, occurring at all speeds. Ive even had the car stall on me when i came to a stop once. I looked at the ignition setup on the car and noticed that two of the nodes on the coil pack are corroded, 5 and 6 to be exact. So im guessin theres an underlying problem that would cause me to change both of those out.

Any one have any thoughts?

[wake]

pull and check ALL the plugs..replace if needed

and clean the coil pack up some to get rid of that corrosion i just used a toothbrush like wire brush with some wd40/carb cleaner, just based on the fact thats all i had at the time ..just be careful with what you use..the last thing you wanna do is get the ICM wet..

any check engine lights? if so..run over to teh part store and get em scanned

[quicksilver]

I forgot to mention that i have new plugs and wires within a year but ill go through and check all the plugs and make sure the wires are damaged..

Btw, I got the wires before knowing of any recommended brands so i cheaped out and got the autozone brand. Guessin i should consider replacing those then.

[01bonneSC]

Should be having the CEL on. What codes you got?

And yes lose the AZ cables.

[wake]

Belden wires for sure..but as far as plugs thats where people on this club tend to differ

[quicksilver]

K, i checked all plugs and wires, all good. I scrubbed those rusty nodes, so theyre pretty clean.

Time to take her for a test drive. And i do have the CEL on, i know that its on for two evap leaks, but while im out ill get that checked out too.

[quicksilver]

And the problem persists.

Did the scan and got two p0442 codes which i knew about, but i also got code p0102. The description said something about air volume and a circuit...

[00Beast]

P0102 is MAF Circut Low Input. Try disconnecting the MAF and driving around, see if it improves. If so, you need a new MAF.

[01bonneSC]

Cant be a miss then.

[quicksilver]

Felt like one at first, but then thinkin about it it seems like air is being robbed from the motor.

...could water kill the MAF?

[Ken_W]

If it is the MAF sensor, water likely has nothing to do with it.

MAF issues are common in our cars once they get up there in mileage. They just wear out after a while. Try cleaning it first, with some CRC MAF Sensor cleaner (you can find instructions here on the board -- it's very easy). If that doesn't help, then it's time to replace it (you can find instructions for that on the board too -- also easy, but you may need to purchase an inexpensive security torx bit set).

A word on replacement MAF sensors; experience here at the Club indicates that aftermarket MAF sensors do not last. It is best do stick with an AC Delco MAF sensor. New ones, however, are very expensive. If you inquire at some local salvage yards, you should eventually be able to find a used one for around $50 (or maybe even less at a yard where you scavenge your own parts). Other cars, like Grand Prix's, use the same MAF sensor, so it is not hard to find at salvage yards. You might scoff at a junkyard part, but a used AC Delco MAF sensor is typically superior to a non-AC Delco new one from Autozone or some other discount source.

Before getting a replacement, however, follow Beast00's suggestion to see if the MAF sensor is indeed to blame. Then try cleaning it (good maintenance to do periodically even when it's working fine). Then, if it comes to it -- replace. It amazes me how many engine gremlins go away on Bonnevilles with a new MAF sensor.

Ken_W

[00Beast]

If you're really not having luck, harofreak00 probably still has a couple laying around.

[quicksilver]

I havent gotten around to the test drive yet, but soon i will today. Last night i had a run in with my best friend jack.

The reason i ask if water would kill the MAF is bc about a month ago we had some good flooding here, and while on the road, i was detoured down a flooded street.... the car sucked up water and stalled out, took ten minutes to start it afterwards.

[DCJREDLINE]

Yeah the MAF cleaner seems expensive at $8 a can but if you consider how many times you can clean/maintain your $60-100 MAF it is well worth it.

[MiDMoTSI]

Before getting a replacement, however, follow Beast00's suggestion to see if the MAF sensor is indeed to blame. Then try cleaning it (good maintenance to do periodically even when it's working fine). Then, if it comes to it -- replace. It amazes me how many engine gremlins go away on Bonnevilles with a new MAF sensor.

Ken_W

I had the same issues, a new MAF (ouch $$$) cured it.

But since my college sophmore daughter drives the car quite a bit, it was worth it to make sure she didn't have any mechanical issues.

[quicksilver]

K i disconnected the MAF and drove around, and bingo, no more stuttering/ choking from the motor, so it seems thats the problem. I guess ill replace it since its got 150k + on it.

[Ken_W]

Cleaning only costs $8 and ten minutes of your time; but if you just want to go ahead and replace that's your call. At 150K it's probably not long for this world anyway (if it is still the original sensor).

Congrats on solving it!

Ken_W

[quicksilver]

I cleaned the sensor last night and plugged the MAF back in, and it worked somewhat, the wires were pretty nasty on the MAF. Like I said though, the problem still exists but not as bad as before.

Ordered a new MAF from Harofreak00, so hopefully that will completely resolve the issue.

[quicksilver]

New MAF received and installed. Problem solved!