87 SD hesitation in low rpms. Looking for some help Update with pics
I just bought an 87 LX 5.0 with 88,000 miles on it. It has an offroad H, flowmasters, 3.73s and a smog delete. The smog delete looks like it was done right, the holes in the back of the head have bolts threaded into them and an aluminum dummy pulley where the pump was.
It was sluggish from idle - 1500 rpms and when shifting during the test drive, but I got a good deal on it and figured it just needed a tune up.
I pulled codes and found a KOEO 67, which I guess is nothing.
I changed the fuel filter and the spark plugs yesterday, seemed to run a little better but same problem.
I have new spark plug wires and cap and rotor coming. Will change those tomorrow.
I tried to clean the IAC with some brake cleaner, it had some carbon in it, kind of hard to clean it out but it's better than it was.
I bought a highflow catted H-pipe to take care of that horrible raw gas smell (daily driver) and a cold air intake, neither of which I have put on yet.
Symptoms:
My low end torque sucks, hesitation off idle and when shifting into gears.
Has stalled out on me a few times coming up to a light.
Popping out of tailpipe when cold at low rpms. Lean?
Any ideas guys? My last 2 stangs were modulars, it's been awhile since I owned a 5.0.
bad O2 maybe?
Injector problem?
I checked the firing order and the #1 plugwire does not go to the spot marked #1 on the distributor. It's at about the 1:00 spot if you are standing infront of the car looking back toward the motor. All other plug wires follow the normal pattern and seem to be in the right order though.
The car pulls really hard at upper rpms...
I just bought an 87 LX 5.0 with 88,000 miles on it. It has an offroad H, flowmasters, 3.73s and a smog delete. The smog delete looks like it was done right, the holes in the back of the head have bolts threaded into them and an aluminum dummy pulley where the pump was.
It was sluggish from idle - 1500 rpms and when shifting during the test drive, but I got a good deal on it and figured it just needed a tune up.
I pulled codes and found a KOEO 67, which I guess is nothing.
I changed the fuel filter and the spark plugs yesterday, seemed to run a little better but same problem.
I have new spark plug wires and cap and rotor coming. Will change those tomorrow.
I tried to clean the IAC with some brake cleaner, it had some carbon in it, kind of hard to clean it out but it's better than it was.
I bought a highflow catted H-pipe to take care of that horrible raw gas smell (daily driver) and a cold air intake, neither of which I have put on yet.
Symptoms:
My low end torque sucks, hesitation off idle and when shifting into gears.
Has stalled out on me a few times coming up to a light.
Popping out of tailpipe when cold at low rpms. Lean?
Any ideas guys? My last 2 stangs were modulars, it's been awhile since I owned a 5.0.
bad O2 maybe?
Injector problem?
I checked the firing order and the #1 plugwire does not go to the spot marked #1 on the distributor. It's at about the 1:00 spot if you are standing infront of the car looking back toward the motor. All other plug wires follow the normal pattern and seem to be in the right order though.
The car pulls really hard at upper rpms...