dotto929

How is it going everybody? So I have tried to search and search for something that sounds like the problem I am having but am having no luck. I have a 2009 Z06 and randomly my car will feel sluggish and jumping while giving it gas and after a few minutes or so of it doing this and I come to a complete stop the idle completely changes and sounds extremely rough. Reduced engine power and service active handling warnings come up on my display. I have found other people who have had those warnings come up but without the extremely rough idle. It sounds like I have a cam in the car that needs to be tuned for it.

Anybody have any ideas what it could be? Thanks for any help.

RichieRichZ06

Sounds like you're experiencing a mis-fire. Check the simple stuff like plugs and wires. If nothing is obvious, buy a cheap code reader and check for a code when it happens. A dead mis will usually show up on the scanner, which will allow you to determine the cylinder causing it.

dotto929

Thanks I'll try that this weekend. It is always random too. Some days it runs great and other it is sluggish and that rough idle happens. But after I leave the car off for an hour or so it starts right up like there was no problem.

SocalChvy

Have you done any modifications to the air intake system recently? The MAF is very sensitive.

psp6158

I'm not a mechanic but I slept at a holiday Inn last night, it is your spark plug wires, re secure them and burp them... It "could" be a bad spark plug but very small chance. Come back and let us know.

Tech

Same thing happened to a friend recently. One of his spark plug wires came apart while driving and caused the same symptoms.

Unreal

Plugs/wires is first check. Then look for a maf leak, intake leak, hose coming off. Odds are its a loose plug wire.

If I wasn't flying out of town this weekend I would say swing by and I'll do it all for you. If you can't find anything, get with Joe@CPR and see when they can fit you in.

Cordes Performance Racing

If you would like to schedule something up sir just let us know, we easily can figure this out for you.

dotto929

So I checked the plugs and wires everything seems okay. Wires are still in good condition and plugs look fine. After starting the car once I got all the plugs back in I let it idle for a few minutes. After about 3 minutes of idle the car dropped to about 400 RPMs and almost died before it jumped back up to normal and then it did this a few more times about 30-45 seconds or so apart. Battery voltage dropped to around 13 when it did that but overall sits at 14.5 or so in idle.

Joe I would be happy to take my car out there and let you take a look if it wasn't over an hour drive and I work all week. Hard to get out on the east side. Do you know anyone on the west side? Are you guys open weekends?

dotto929

Also haven't touched the intake other than to clean the filter and MAF sensor still looks good. Like I said this happens so randomly. I will go weeks without it doing this and then all of a sudden out of nowhere it starts back up again.

dotto929

Did the car go back to normal before he fixed it? My issue is it happens and then a few minutes of the car shut off it starts back up like there was never an issue

wannagofast

I have a post in the c 6 scan and tune...My 2007z was doing the same thing installed a new throttle body on and seems to have cured itself.

Tech

It went right back to normal with a wire. Take your fuel rail covers off and park in a dark place. Pop the hood and let the car idle and look very closely at the plug wires on both ends.

If you can't find anything wrong, hooking a scan tool up to it is the next step I'd suggest. Misfire codes are P0300 to 0308. P0300 indicates "multiple random" misfires. The rest of them indicate which cylinder detected the misfire. If you can isolate the cylinder, you can try moving around plugs, wires, and fuel injector to see if the issue follows it.

harrydirty

Take off your air filter assembly and look into the tube end to see if the hydrocarbon absorption pads have come loose. If they are loose they can screw up the air flow and cause havoc with the MAF. I took mine off and car runs fine without them.

Unreal

It can be hard to visually inspect the wires. I've had a pin hole in one, that only arc'd and misfired when hot.

RichieRichZ06

I assume that you have a K&N style air filter because you mentioned cleaning it. If that's the case, you might want to re-check the MAF and make sure it wasn't over oiled when you cleaned it. A small drop of oil on the MAF will cause all kinds of drive ability issues similar to what you're describing.

Unreal

Too bad you are not on this side of town. I could swap in a known good maf in <60 seconds and see if that fixes it.

Treadhead

Check the harnesses that connect the coil packs. Mine recently had a similar issue, and there was a sharp bend in the main loom that the coil pack harness connects to. Straightened it out and all is well.

Unreal

If that is the case, sounds like some possible internal wire damage, and should be inspected/repaired.

Cordes Performance Racing

I get cars from all over the country an hour drive isn't to bad :p

all joke's aside I don't know anyone on the westside. and we are closed on the weekends, I can meet someone here for a dropoff but no work is done.