Please Help...Z Problems...
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Registered User
Joined: Apr 1999
Posts: 220
From: South Bend, IN
Please Help...Z Problems...
I know this is a common problem, and everyone lately seems to be complaining about it, but I think my problem may be a bit unique.
Lately I've been experiencing some wierd symptoms with my Z. I'll be driving down the road, and then all of sudden at speeds below 40 mph, she'll start missing. And running really rough. Almost like its choking. When I come to a stop, the idle drops really low, and continues to choke. I give it gas, and the rpm's do go up, but the motor just kinda chuggs along as its accelerating. But then, five minutes later, (while driving) it's fine. The motor runs smooth as if nothing ever happened. It's the weirdest thing. My SES light is on, and I had it scanned, and they said there was an EGR system system failure. I forget the code number....but would this make my car run that bad??? I tried resetting the computer by pulling the PCM fuse, and for a short while, maybe 1/2 hour, there's no SES light, and no choking symptoms. The car runs great. <http://web.camaross.com/bb/confused.gif> Could I have a small exhaust leak that would make the car run that way? But seriously, when I reset the computer, the choking problems and the SES light are gone for quite a while. But it seems that after the car is warm...the missing starts happening. Here's what's been changed so far...
1. O2 sensors (new)
2. Fuel filter, (less than year old.)
3. water pump, and new sensor
4. plugs (new)
5. wires (new)
6. cleaned MAF
Any ideas that can be added to my checklist would greatly be appreciated.
------------------
'97 Z28 A4
Free mods, K&N FIPK, Hyp. 160 thermostat, HPP+, Air Foil, Mac Headers
w/off-road y-pipe, Flowmaster AT Cat-back, LT4 KM, Edelbrock STB, Richmond 3.73's, MSD 6A, Taylor Wires, Trans-go Shift-kit, BMR Panhard rod, Energy Suspension bushing in the rear, LS1 driveshaft,
Best 1/4 - 13.52 @ 101 mph - before headers
Best 60' - 1.96 (Goodyear F1's.)
Lately I've been experiencing some wierd symptoms with my Z. I'll be driving down the road, and then all of sudden at speeds below 40 mph, she'll start missing. And running really rough. Almost like its choking. When I come to a stop, the idle drops really low, and continues to choke. I give it gas, and the rpm's do go up, but the motor just kinda chuggs along as its accelerating. But then, five minutes later, (while driving) it's fine. The motor runs smooth as if nothing ever happened. It's the weirdest thing. My SES light is on, and I had it scanned, and they said there was an EGR system system failure. I forget the code number....but would this make my car run that bad??? I tried resetting the computer by pulling the PCM fuse, and for a short while, maybe 1/2 hour, there's no SES light, and no choking symptoms. The car runs great. <http://web.camaross.com/bb/confused.gif> Could I have a small exhaust leak that would make the car run that way? But seriously, when I reset the computer, the choking problems and the SES light are gone for quite a while. But it seems that after the car is warm...the missing starts happening. Here's what's been changed so far...
1. O2 sensors (new)
2. Fuel filter, (less than year old.)
3. water pump, and new sensor
4. plugs (new)
5. wires (new)
6. cleaned MAF
Any ideas that can be added to my checklist would greatly be appreciated.
------------------
'97 Z28 A4
Free mods, K&N FIPK, Hyp. 160 thermostat, HPP+, Air Foil, Mac Headers
w/off-road y-pipe, Flowmaster AT Cat-back, LT4 KM, Edelbrock STB, Richmond 3.73's, MSD 6A, Taylor Wires, Trans-go Shift-kit, BMR Panhard rod, Energy Suspension bushing in the rear, LS1 driveshaft,
Best 1/4 - 13.52 @ 101 mph - before headers
Best 60' - 1.96 (Goodyear F1's.)
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
This really belongs on the "LT1 Tech" board.... most of the LT1 people from "Advanced Tech" will post there as well.
Moving.....
------------------
Fred
94 Formula A3+1: 381/TH400+OD/N2O
Advanced Tech Posting Guidelines
Detailed Mod's List
11.513@115.59 on motor; 11.162@127.67, 1.643 60' on a 125-shot. Going with a 275-shot this year
Moving.....
------------------
Fred
94 Formula A3+1: 381/TH400+OD/N2O
Advanced Tech Posting Guidelines
Detailed Mod's List
11.513@115.59 on motor; 11.162@127.67, 1.643 60' on a 125-shot. Going with a 275-shot this year
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