weird ping? when flooring it?
Senior User
Joined: Oct 2002
Posts: 120
Likes: 0
From: Des Moines Iowa
weird ping? when flooring it?
Ounce in a while my truck makes this weird knocking noise when I floor it. And when it does it power drops hard. What in the he&% is it.
1990 F-150 5.0 xlt lariet
Msd6a, 8.5 msd wires, blaster 2 coil (msd),
3.73 gears - eaton Posi trac, 33 spline,
straight exhaust (flow master), modified air intake.
1990 F-150 5.0 xlt lariet
Msd6a, 8.5 msd wires, blaster 2 coil (msd),
3.73 gears - eaton Posi trac, 33 spline,
straight exhaust (flow master), modified air intake.
Senior User
Joined: Feb 2000
Posts: 482
Likes: 1
From: Connecticut
weird ping? when flooring it?
Are the MSD 8.5mm wires spiral core magnetic suppression wires?
I've tried using spiral core wires on my 89 5.0L and they would always cause a miss along with spark knock at conditions that would advance the timing, such as part throttle, low rpm's and full throttle. Not sure why, maybe crossfire in the cap or electromagnetic interference that disturbs the computers inputs.
Mark
I've tried using spiral core wires on my 89 5.0L and they would always cause a miss along with spark knock at conditions that would advance the timing, such as part throttle, low rpm's and full throttle. Not sure why, maybe crossfire in the cap or electromagnetic interference that disturbs the computers inputs.
Mark
Senior User
Joined: Aug 2000
Posts: 116
Likes: 1
From: Baldwin, ND
weird ping? when flooring it?
Have you put a chip in your truck? If so you need to run a higher octane gas to help with the advancing distributor. Might want to try higher octane anyway and see if that'll help.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
weird ping? when flooring it?
[updated:LAST EDITED ON 30-Nov-02 AT 09:21 AM (EST)]Check your ignition timing. If the engine has a lot of miles, consider changing the timing gear set. TFIs are known to go out, so consider replacing it, too. Is it running hot? Have you pulled the codes? It may be running lean. I recently found a BAD miss that only appeared under load. It was caused by a plug boot working its way up the wire, allowing the spark to jump from the wire to the head. It didn't appear when I was looking under the hood until I pulled the IAC to clean it, but all it took was sliding the boot back down. Check all the simple things. Air filter, fuel filter, EGR, SPOUT, vacuum lines, ...
Senior User
Joined: Oct 2002
Posts: 120
Likes: 0
From: Des Moines Iowa
weird ping? when flooring it?
thanks for the info, I pulled apart my ignition and I discovered that my rotor and cap were wasted, I do not know how I let this slip by. This is imbarressing, im a gear head and could be sacrificed to the car gods for this.
thanks jason.
1990 F-150 xlt
