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Old 05-28-2014, 11:02 PM   #1
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RPM issues

I can't get my car over 4200 RPM. Sitting in neutral, in gear driving. Not matter what condition.
I have an aftermarket tach. And stock tach both working. The thing is the aftermarket tach. says I am hitting 5000 when the car sputters and breaks up from accelerating.

I really doubt I have a 4200 or 5000 rev limiter. I want the rest of my missing rpms

Any ideas?
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Old 05-29-2014, 09:28 AM   #2
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Could be a fuel problem, could be a weak ignition, could be a problematic aftermarket ignition, could be shot wires etc...

When was the last time you changed your fuel filter?

When was the last time you did the plugs/wires?

Is your ignition stock? If not, remove any ignition boxes or gizmos and see if it works with the stock ignition.

When did the problem start?

Did you do anything as far as any sort of maintenance or mods right around the time the problem started?
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Old 05-29-2014, 01:26 PM   #3
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First I had a no spark ,no fuel issue turned out it was the EEC relay. Fixed and running

I dropped the fuel tank thought it was the fuel pump but it wasn't. Changed the filter at that time. Running 35lbs of pressure at idle bumps up to 40lbs throughout full throttle.

MSD 6al box **** the bed (I think) so I am running on stock ignition with a MSD coil with 13.6 volts (tested at idle).

New motorcraft plugs (gapped at .49 was at .054 to see if anything would change) with ford racing 9mm plug wires.

Stock distributor with MSD cap.

To be honest with you I bought the car in March and I really don't know if this was an issue before I bought the car.

Could it be that the COIL is about to crap out and is sending a weak spark up in the higher rpms?

Attached is what the car has. I will upload the recent maintenance that was done.
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Old 05-29-2014, 01:30 PM   #4
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This is what it has minus the msd box
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Old 05-29-2014, 02:00 PM   #5
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Here is a video of 1st and 2 nd gear
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Old 05-30-2014, 08:12 AM   #6
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Ok it's not the coil.

Thinking it's the heads, possible valve spring floating?? I am at a loss.

Maybe a coyote swap will resolve all this....
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Old 05-30-2014, 08:26 AM   #7
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Coyote swap will resolve most things... Power adder on the Coyote solves it more.

Could be the module or the dizzy itself. The PIP (pickup) in the distributors are a known issue. If you pull the cap and there is a silvery dust under there it could very well be it.
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Old 05-31-2014, 10:38 PM   #8
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Thanks Scott going to throw a new distributor in sometime this week. I will get back to you to let you know. #frustrated
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Old 06-13-2014, 09:27 AM   #9
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It looks to be I have floating valves. The stock e7 head springs can't handle the trick flow cam. Mind you I bought the car this way not knowing the guy swapped the trick flow heads out with the e7 heads before he sold the car. So my car won't rev. Over 4500 rpm. I am thankful I didn't hit a piston or cause any damage.

So I can

upgrade the springs

Buy a new e303 cam

Buy new reman. heads.

What should I do? Suggestions? Mind you trying to stay in a budget of $1000
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