Nascar83Fan
Active Member
- Joined
- Jul 2, 2010
Wondering if anyone in the el paso tx area has some time to offer some help. Have mal code 42 on scanmaster.
I checked all vacuum lines, installed new ecm, new coil & icm, all the grounds that were on passenger side head were moved to firewall by one of the previous owners. All underhood connections are fine, after 10 or so minutes of running the car it will then start to run rough, rpm's will dip from 700ish down to 500's and then rpm falls alittle lower which causes it to die out eventually. I haven't checked behind the glove box yet to see if something back there is the cause of it and Car never got above 165 on coolant temp and the stock electric fan was running the whole time after starting her up everytime. It tries to restart but acts like it lost track of proper timing or firing and stalls out even pumping on gas after a few seconds. It was doing this before replacing the coil, ign control module and the ecm just in the past 3 days.
It was running fine until this past sunday when it started actting up, after it cooled off a bit and changing a plug wire everything was good. After i shut it off for 10 minutes once i got back to the house from oreilly's and went back out again to go grab some food it had with-in 5 or so minutes started actting up bad again. I have her sitting at an oreilly's on dyer st and been troubleshooting the problem since monday afternoon in their parking lot. Starter is new also, can get her to run for 10 to 15 or so minutes in park and then something starts messing with the timing and makes it start actting up. Before the above time period is reached it can be brought upto 3000+ rpm with no issues from idle to mid and higher rpm range of knock etc.
I'm not leaving it rev'd up high, just was raising rpm to diff ranges to see if it was gonna try to show any signs of actting up. I didnt see anything wrong with the crank sensor area and i did the maf tap test while running which didnt change anything. I've noticed it runs better & longer with the new ecm over the old ecm, but once enough time elapses between 10 to 15 or so minutes) from a cold start up, the gremlin shows up again. I know this seems similar to an issue another couple members had, but outside of double checking fuses, looking under the cam position sensor cap, seeing if cam sensor is flaking and checking the ccci factory wiring coming from fuse panel that runs behind the glovebox, i'm running out of things to try to make the gremlin go away. The o2's and cc's are cycling on the scanmaster like they should be in the correct ranges, so i don't think it's o2 sensor related. Will double check fuel pressure, but pretty sure that it's not the issue since it's getting plenty of fuel.
I have a '87 Turbo Regal T with TT 5.6 chip that was burned for 91 octane, 15-17psi boost and 17-19 deg timing with what looks like 28 pound for the injectors on the label on the bottom of the chip, factory style airbox with k&n air filter, stock intercooler, stock turbo, no alky kit, hydroboost converted brakes. The previous owner claimed they had a mild cam and head porting work done along with having heavier duty valve springs installed. I'm alittle leary of trying the stock chip to see if it's chip related due to the differences in timing setup with the few mods that had been done by previous owner. I dont want to hurt anything internal, thanks.
Cell # ( 850 ) 567-0123 Carl
Posted from the TurboBuick.Com mobile app
I checked all vacuum lines, installed new ecm, new coil & icm, all the grounds that were on passenger side head were moved to firewall by one of the previous owners. All underhood connections are fine, after 10 or so minutes of running the car it will then start to run rough, rpm's will dip from 700ish down to 500's and then rpm falls alittle lower which causes it to die out eventually. I haven't checked behind the glove box yet to see if something back there is the cause of it and Car never got above 165 on coolant temp and the stock electric fan was running the whole time after starting her up everytime. It tries to restart but acts like it lost track of proper timing or firing and stalls out even pumping on gas after a few seconds. It was doing this before replacing the coil, ign control module and the ecm just in the past 3 days.
It was running fine until this past sunday when it started actting up, after it cooled off a bit and changing a plug wire everything was good. After i shut it off for 10 minutes once i got back to the house from oreilly's and went back out again to go grab some food it had with-in 5 or so minutes started actting up bad again. I have her sitting at an oreilly's on dyer st and been troubleshooting the problem since monday afternoon in their parking lot. Starter is new also, can get her to run for 10 to 15 or so minutes in park and then something starts messing with the timing and makes it start actting up. Before the above time period is reached it can be brought upto 3000+ rpm with no issues from idle to mid and higher rpm range of knock etc.
I'm not leaving it rev'd up high, just was raising rpm to diff ranges to see if it was gonna try to show any signs of actting up. I didnt see anything wrong with the crank sensor area and i did the maf tap test while running which didnt change anything. I've noticed it runs better & longer with the new ecm over the old ecm, but once enough time elapses between 10 to 15 or so minutes) from a cold start up, the gremlin shows up again. I know this seems similar to an issue another couple members had, but outside of double checking fuses, looking under the cam position sensor cap, seeing if cam sensor is flaking and checking the ccci factory wiring coming from fuse panel that runs behind the glovebox, i'm running out of things to try to make the gremlin go away. The o2's and cc's are cycling on the scanmaster like they should be in the correct ranges, so i don't think it's o2 sensor related. Will double check fuel pressure, but pretty sure that it's not the issue since it's getting plenty of fuel.
I have a '87 Turbo Regal T with TT 5.6 chip that was burned for 91 octane, 15-17psi boost and 17-19 deg timing with what looks like 28 pound for the injectors on the label on the bottom of the chip, factory style airbox with k&n air filter, stock intercooler, stock turbo, no alky kit, hydroboost converted brakes. The previous owner claimed they had a mild cam and head porting work done along with having heavier duty valve springs installed. I'm alittle leary of trying the stock chip to see if it's chip related due to the differences in timing setup with the few mods that had been done by previous owner. I dont want to hurt anything internal, thanks.
Cell # ( 850 ) 567-0123 Carl
Posted from the TurboBuick.Com mobile app