Burble at Idle but Close to a Cure!!!

[vette-dude]

Well instead of continuing to hijack the thread below I will start a new one to update the problem.
http://corvetteactioncenter.com/forums/showthread.php?t=55479

I have cured the hi-speed miss with cap rotor and new plugs correctly gapped. Put in new 02 sensor and fuel filter also. Ran the vette up the freeway to about 115 mph ( nobody else was out there so it was fairly safe to do this) and no miss. Now at an idle, in gear, it has what I call an occasional "burble" ? Neighbor is an instructor for Firestone and has an Allen Data Scope in the garage so we hooked it up to see what the problem might be. Scope shows bad sparkplug wires on two cylinders. No codes in on the DTC though. Am going to order new plug wires and clips and this should resolve the problem. (I think Bubba must have stuck a pin through the insulation on the plug wires for cylinders, #1 and #8. Probably where he/she hooked up a non-inductive timing light or something.) Oh well, time to do search for sparkplug wires and see what is the best brand to put on. The car realy feels like it has about 30 more HP (wishful thinking) now that it is hitting on all 8. Any suggestions for wires would be appreciated. Thanks.

Randy

PS: Do the Accel wires come custom made to fit my 91 Vette? and will the stock wiring looms/separators fit the 8MM wires? How bout the others? MSD, Taylor, Etc.

 

[Edmond]

I went with the 8mm Delco set with Bosch +4 plugs. I'm going to check the plugs later in the week before I go for emissions.

I don't think there really are a bad brand of wires out there. I've heard good things about Taylor.

The 8mm should fit the stock looms/separators. I don't know if they'd fit for the 8.5mm wires, which some folks do.

I know the feeling about having the car tuned fresh. It does feel like you gained 30 hp. That O2 sensor definitely gave you better throttle response. Chance the PCV valve and I think you'll get a smoother ride quality. As far as I know, when I changed my PCV this summer, it was the first time that it had been done.

Fuel filter wouldn't do any harm along with a couple bottles of Chevron Techron additive with a full tank of premium.

 

[vetteboy86]

Yep I too know the feeling. Put new cap,rotor,coil,wires,plugs,O2 sensor, and also cleaned the filter. I felt a huge kick in the seat of the pants. I guess it might be the satisfaction of having a fresh tuned car. I went with the custom wires, my local parts store didn't have a direct fit. I found the wires to be okay, if you have a little patience. I do like the fit, because you can make them to length.


Craig

 

[vette-dude]

Thanks for the responses. Am going to research the plug wires today and get a pcv valve. Keep forgetting to pick one up. Brain fart but I have an excuse, I'm old!!!!


Randy