problems at or near WOT

A month or so ago I had a couple of my spark plug wires end up laying on my headers and getting burned through, which of course caused a bad driving experience, bucking under accel, etc., I replaced the wires as soon as I found out that was the problem, I also replaced those 2 spark plugs, the dead cylinders were fixed of course.. but now I'm having problems at cold startup and at anything above say 80% throttle. This is a 93 5.0 btw.

At cold startup, it starts fine, but it runs really poorly, if u give it too much gas to quickly it dies. After it warms up for a couple minutes it is fine at idle, and at part throttle through all the rpm range, but no matter the rpm, it accelerates fine till you get to about 80-90% WOT then it noses over and loses all power, almost like it hit the rev limiter, it will also backfire at times if you keep your foot in it. I had just replaced my O2 sensors about 6 months ago, I was thinking maybe having 2 dead cylinders messed the one up, but at cold start and at wot is the only times that it doesn't use the o2 sensors correct?

I replaced all the spark plugs, all looked good, maybe a little lean, I also have an A/F gauge, which does it's normal bouncing at idle, but falls off the the lean side of the range as you accellerate, and gives no reading at WOT. What do I need to look at next.. FPR? The plugs say it's running fine, or a little lean, my A/F gauge says lean on the part throttle tip in period.. but it acts like it's loading up on fuel, so I'm confused.. any help would be appreciated.

Reply to
woods2073
Loading thread data ...

I further inspected my car a minute ago.. found I had a missing header bolt, so I replaced that too, I had been wondering why my exhaust was so loud.. I've also been thinking could it just be the ignition coil.. I believe it's the original, and i'm sure having 2 wires grounded to the headers didn't help it's life. I replaced all the spark plug wires, not just the 2 that were bad, and I guess I'm gonna go ahead and get a cap and rotor, and a new coil and see if that helps.

Reply to
woods2073

you have a rich mixture focktard anytime u have backfire check spark again measure ohms max 6000 per foot

the fuel pressure there ya go FOCKTARD

hurc ast

Reply to
omarsimms25793

header

coil..

A coil is a possibility, since it's losing power on the top.

Is your check engine light illuminated? Regardless, I'd have the computer checked for codes. Most auto parts store will do it for you for free.

Patrick '93 Cobra

Reply to
NoOption5L

This is an interesting reply coming from someone who can't even put together a coherent sentence.

Patrick '93 Cobra

Reply to
NoOption5L

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.