Hi gang! I'm new to the board and this thread may have been beaten to death already but here goes.
I have a 92 Burb that recently developed a miss under load. Truck starts fine, rev's up fine in park, but once you put it in gear it falls flat on its face! I replaced the MAP sensor, IAC, EGR, EGR solenoid, wires, plugs, cap, rotor (good stuff, AC Delco and cap with brass fittings). I did the cap and rotor a few months ago and the truck had been running fine.
The trouble started a few weeks ago. Ran great going down the highway and when I came off the off-ramp to a stop sign it seemed to want to die. Came to a stop fine, but when I went to take off, it loaded up and started missing. Mashed the go pedal and it took off. After that didn't have a problem. Few more days go by and no problems. It was intermittent like that for a few weeks. Now it does it all the time. Starts fine, idles fine, you can rev it up, (although it seems to want to load up a bit when you jam on the gas), but when you put it in drive and hit the gas, she just stumbles baaaaad!
I am going to try and put in a new coil, could be weak and for only 20 bucks it's worth a shot. I have looked for arcing..nada..I tested resistance on all the plug wires..every one is within spec (less than 1000 ohms per foot).
This is driving me nuts! HELP!!
I have a 92 Burb that recently developed a miss under load. Truck starts fine, rev's up fine in park, but once you put it in gear it falls flat on its face! I replaced the MAP sensor, IAC, EGR, EGR solenoid, wires, plugs, cap, rotor (good stuff, AC Delco and cap with brass fittings). I did the cap and rotor a few months ago and the truck had been running fine.
The trouble started a few weeks ago. Ran great going down the highway and when I came off the off-ramp to a stop sign it seemed to want to die. Came to a stop fine, but when I went to take off, it loaded up and started missing. Mashed the go pedal and it took off. After that didn't have a problem. Few more days go by and no problems. It was intermittent like that for a few weeks. Now it does it all the time. Starts fine, idles fine, you can rev it up, (although it seems to want to load up a bit when you jam on the gas), but when you put it in drive and hit the gas, she just stumbles baaaaad!
I am going to try and put in a new coil, could be weak and for only 20 bucks it's worth a shot. I have looked for arcing..nada..I tested resistance on all the plug wires..every one is within spec (less than 1000 ohms per foot).
This is driving me nuts! HELP!!