mpfi help

fitted mpfi setup today still using the old dizzy it runs fine but does not advance that much only 10 deg at most giving 20 deg total what would be causing this .

Is this normal for converted cars cause its really doesnt want to rev above 2 grand


also the iso is not working would this have a issue this problem

would it be in the limp home mode cause all this problems

thanks for the help

[EA2BA]

My car was way retarded when it would not rev about 2grand

run the timing to about 10deg advanved see if it pings and revs out more, if not you will be on the right track.

the base timing is set right even tryed more timing i think its in limp home mode but cant work out why

[EA2BA]

limp mode should be 3rd gear only, it will still rev all the way out, will just be very slugish off the line and driving along, can you rev it above 2 in neutral

yeah it does change gear and everything kicks down and stuff just will not advance the timing as much as it should

plus i dont know why the isc is not working done everything www.ford-tech.com guide said to do

[EA2BA]

to test ISC is very simple, turn idle down till the car is at about 500rpm, then disconnect the ISC, if it stalls it is working, if it doesnt notice then it is doing nothing

[EA2BA]

Have you checked the TPS is at 1v at closed throttle and max of 4.5v at WOT.

not yet which one of the two should i be checking

[EA2BA]

with ign on (car not started) the green wire is the positive lead, and then earth the multimeter to the body, then with a reading, turn the throttle to WOT by hand and see what it says.

thanks dellboy i will go check the now

ok both tps senser are show .780 closed and 4.38 wot

[EA2BA]

OK TPS is supposed to be 1 at closed, so loosen the screws and try adjust it to be in spec, if not adjustment left, then elongate the holes to give you the adjustment.

Tip: Easy way to allow adjustment for testing to decide if its the problem is remove one screw and leav eit out then you can get it within spec tighten remaining screw and test

kool that has help alittle but still the timing is not advancing like it should only get to 20deg max when with the cfi was get up around 35 starting to think its the dizzy

[EA2BA]

Are you still using the CFI dizzy as they have no PIP signal for TDC this could be your problem.

yeah i am still using it im getting a hole mpfi wiring loom asap with a mpfi dizzy if this dont work im going back to cfi since it went harder

[EA_Bender]

when i did mine, i found an MPFI loom and left my CFI dizzy exactly where it was, runs smooth as and gets lot of power out of it

[InitialD]

Originally Posted by TWiZTiD EA

im going back to cfi since it went harder

:yeees: Yer CFI is better for performance Biff

Just change the dizzy like we said to you at pickapart and set the timing correctly to the IGN mark

it was not the dizzy at all it was the fact with the cfi ecu wiring loom some of the wires did not match up to the mpfi loom with some help from my dad i rewire the isc back to the ecu and the car goes great just to let people now there are a few differnces between
some of the wiring looms that are easy to fix thats not shown in the www.ford-tech.com doco

[pepsimax]

well that would do it every time

[InitialD]

Originally Posted by TWiZTiD EA

it was not the dizzy at all it was the fact with the cfi ecu wiring loom some of the wires did not match up to the mpfi loom with some help from my dad i rewire the isc back to the ecu and the car goes great just to let people now there are a few differnces between
some of the wiring looms that are easy to fix thats not shown in the www.ford-tech.com doco

Umm yes it does tell you where to run the wire from the CFI ISC wiring loom to the MPFI loom, it says so in the document I sent you... which was a copy of the Ford-tech.com document. :voldar02:

there is more then that one wire wrong mick