. . =3D=3D=3D=3D=3D =3D=3D=3D=3D=3D
98 Checcy Balzer cuts out in overdrive. On Jan 31, 2005, 8:33pm (CST-2) snipped-for-privacy@yahoo.com (john=A0smith) chunked his scanner across the shop, ripped his ASE Master Cert patch off his right shoulder.....and screamed out ....... . . Group,
Help,
I am having a problem with a 1998 Chevy Blazer that is cutting out when it is in overdrive.
The tach drops about 500 rpms and then comes back intermittently. If you downshift it does not exhibit the problem. =A0=A0=A0=A0Also, it is noted that the MIL light is not on and no codes are set. I already replaced plugs, cap, rotor, coil, module and wires. Any suggestions would be appreciated. It was also difficult to start and I replaced the ignition switch and the battery. The fuel pressure is right on and I replaced the relay and fuel filter too... I connected a fuel pressure gauge to the test port to check the pressure and drove it with the gauge under the wiper arm and observed no pressure drop when it was running. Also, I had the code reader connected and was observing the parameters and the only thing that showed up was a drop in the rpms when it started cutting out. Help...
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D John John,
hold yer foot LIGHTLY on the brake pedal effectively eliminating TCC operation and see if the symptom goes away.
If what your feeling is lockup kicking in and out at cruise speeds in OD, then dropping it down in 3rd gear is forcing you to give the truck jest a bit more gas pedal to keep speed up.....which will bring throttle angle up past a sensitive spot in the PCM programming and keep the symptom from showing up in 3rd.
There IS....a PCM program update to address the prob if that's what it is......
However...... if holding yer foot on the brake pedal in OD stops the symptom....try this first........ buy some good throttle body cleaner and soak down the throttle plate and clean it up really good to eliminate any carbon buildup that may be holding it open jest a WEE bit. Then unhook the BAT NEG cable for a few minutes to clear PCM KAM, start it up and let it idle for a minute then go on another test drive and see if this "Cheap Reflash" does any good.
no gaurantees......
by the way......you said the MIL wasn't on..... you didn't say if any codes were in memory.
00 L O
MarshMonster ~grabs his crown royal....heads over to KJ's fer a ride on the toy...wonders if he should carry some wrenches~