g878don
05-19-2006, 02:16 AM
hello,
i purchased an 87 t last fall which has several mods. te61 charger,houston downpipe, hooker2.5" ex,hooker headers,009 injectors,champion iron heads, champion lower intake,front mount intercooler,art carr3000 stall conv,art carr trans,has aftermarket fuel pump w/hot wire kit, anyhow you get the idea it has had a lot of money spent on it.
this car was a rocket when i bought it and still is. it developed a weird problem lately. it started by momentarily cutting off when you were just driving down the road. when it did this it would show the check eng light just for a second then it would go off. the car acted like it was restarting whenever it did this because the fast idle would come up just like a restart.
i figured ecm problems and started by pulling the ecm and inspecting just by accident i found that by just touching one corner of the chip it would start acting strange and the check eng light would start dimly blinking very fast. if you pulled back on the chip it would quit. so i figured i had the problem and bought another ecm to fix it.
now that stopped the problem of cutting off and seemed to be fine. but now the car is very rich all the time. o2 reading on scanmaster stays 850-900 at full throttle where it was always about 770-780 before. i replaced the o2 because i had one go wacky after i bought it, no change. all of the readings on the scanmaster seem to be normal except for blms which are 90-95 at idle or cruise, and the maf might be about 5-7 at idle and o2 is always rich.
it runs ok but you can tell it gets lazy in 3rd gear from being so rich.
does anyone have any ideas what could have happened here ? i am fairly new to these cars but have been in performance cars and racing for about 30 yrs. it has me scratching my head regularly.
thanks for any info,
dg
i purchased an 87 t last fall which has several mods. te61 charger,houston downpipe, hooker2.5" ex,hooker headers,009 injectors,champion iron heads, champion lower intake,front mount intercooler,art carr3000 stall conv,art carr trans,has aftermarket fuel pump w/hot wire kit, anyhow you get the idea it has had a lot of money spent on it.
this car was a rocket when i bought it and still is. it developed a weird problem lately. it started by momentarily cutting off when you were just driving down the road. when it did this it would show the check eng light just for a second then it would go off. the car acted like it was restarting whenever it did this because the fast idle would come up just like a restart.
i figured ecm problems and started by pulling the ecm and inspecting just by accident i found that by just touching one corner of the chip it would start acting strange and the check eng light would start dimly blinking very fast. if you pulled back on the chip it would quit. so i figured i had the problem and bought another ecm to fix it.
now that stopped the problem of cutting off and seemed to be fine. but now the car is very rich all the time. o2 reading on scanmaster stays 850-900 at full throttle where it was always about 770-780 before. i replaced the o2 because i had one go wacky after i bought it, no change. all of the readings on the scanmaster seem to be normal except for blms which are 90-95 at idle or cruise, and the maf might be about 5-7 at idle and o2 is always rich.
it runs ok but you can tell it gets lazy in 3rd gear from being so rich.
does anyone have any ideas what could have happened here ? i am fairly new to these cars but have been in performance cars and racing for about 30 yrs. it has me scratching my head regularly.
thanks for any info,
dg