Ignition problem ?
Thread Starter
Junior Member
Joined: Feb 2014
Posts: 10
Likes: 0
From: St Pete, Fla
Ignition problem ?
Idle issues.
Have replaced Idle Air Control Valve, MAP, Distributor, control module, Ignition switch, coil, rotor, distributor cap (MSD), wires, plugs, and it still idles rough, backfires into the intake. feels like it is starved for gas but has 40psi at the fuel rail. Getting ready to replace the TPS, as just off idle it seems to have power but more pressure causes it to stumble and bog down.
Have replaced Idle Air Control Valve, MAP, Distributor, control module, Ignition switch, coil, rotor, distributor cap (MSD), wires, plugs, and it still idles rough, backfires into the intake. feels like it is starved for gas but has 40psi at the fuel rail. Getting ready to replace the TPS, as just off idle it seems to have power but more pressure causes it to stumble and bog down.
1994 F150 XLT 5.8L 2wd
Joined: Mar 2014
Posts: 2,150
Likes: 249
From: Iowa
Check the codes. Test everything you can think of with a voltmeter to ensure everything is getting/sending properly. Also may want to check compression, my GF's car was acting the same way and it turned out 0 compression on a cylinder (just a thought).
