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 Post subject: EA MPFI QUESTIONS...
Posted: Sat Jan 02, 2010 7:17 pm 
Oompa Loompa
User avatar

Age: 25

Posts: 30

Joined: 23rd Feb 2008

Gallery: 5 images

Ride: EA Falcon S

Location: Adelaide
SA, Australia

EA MPFI Auto, I am experiencing hesitation/misfire when very little throttle is applied, either from a standstill or at speed, this occurs anywhere below about 1700rpm. Anything above this rpm is fine. It seems that as it warms up the hesitation decreases but does not go away completely. Coolant temp and air temp sensors are reading ok, TPS is reading about .90V closed and 4.40V WOT. The entire ignition system has been overhauled and the fuel filter has been recently replaced. Gaskets have been recently replaced and all bolts are tight. timing is also spot on,

Should i be running it advance a few degrees at base idle?

Took the ISC off, cleaned it and applied voltage to the solenoid to see if it works, as i think this is the problem, works fine off the car but the ECU readings at the ECU connector are off spec.

Readout on ECU is 12V with Ignition on and 10.5V with engine running, should be 9V and pulsing between 9 and 10.5V respectively according to Gregorys.
Would this be the cause of my problem?.

Also what is the effect of the 'throttle cable tension' screw? could this be my problem?

Any advice/information would be greatly appreciated.
 Post subject: Re: EA MPFI QUESTIONS...
Posted: Sat Jan 02, 2010 7:53 pm 
Getting Side Ways
User avatar

Age: 48

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Have you tried puting extra earths from the engine to the body????
How is the earth wire that goes near engine mount for the ECU????



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