ingnition timeing problem on el 5.0l that is in my GQ

[v8maverick]

hi people i have a EL or NF fairlane 5.0L in my forby ive got everything done but im haveing problems with the ignition timeing.
When i ground the STI wire to start the IOER test to set the timeing the book says set it at 30 -32 degrees wich ive done and works fine but when i start the car in normal mode the time timeing works fine under 2500RPM but as soon as you go past that point the timeing drops to about 10 degrees and the thing is that gut less it bearly moves, and if you try rev it more it starts to almost call it a backfire out the exhaust.
But if i put it back into IOER test mode it revs nice and no problems right to rev limmeter.
ive tryied new dizzy modual, TPS sensor is working ect
i dont know what to do next does any one have any ideas.
thanks matt

[ludacris]

It could be totally something different like a faulty fuel pump. Might be a good idea to check fuel pressure and flow. I had a similar problem.

Cris

[mhgill]

try ford forums or fordmods.

[351ciofgrunt]

www.fordforums.com.au

They've helped me with questions on my 351c

[PGS 4WD]

Are you sure that the spec is 30-32 degrees? It sounds like a massive over advance causing a rotor phasing issue. It's been a while but I thought their was a timing indicator on the balancer for TDC and one for setting when in diagnostic. I dial up most distributor cars on the dyno as there is always some benefit to optimizing the timing, especially if running premium.

joel