fiestaturbo.com

[Avinitlarge]

I finally fitted my ofac management today, 2Problems though,

It wont rev, Idle is fine, If you slowly press the throttle it revs but if you floor it the engine dies.

Rev counter dosnt seem to go very high, Rev counter shows half of what its actually reving at

[Ollybee]

Could be only firing on one side of the coil?

[Avinitlarge]

Ive sorted the rev counter problem now, Its just the other problem, Why wont it rev?

[kezrs1800]

TPS or map sensor problem more than likely but could be dodgy wire some where best bet is to get a diagnostics done.

take it you changed from OFAB to OFAC and not from efi to OFAC.

[kezrs1800]

TPS or map sensor problem more than likely but could be dodgy wire some where best bet is to get a diagnostics done.

take it you changed from OFAB to OFAC and not from efi to OFAC.

[kezrs1800]

TPS or map sensor problem more than likely but could be dodgy wire some where best bet is to get a diagnostics done.

take it you changed from OFAB to OFAC and not from efi to OFAC.

[Avinitlarge]

TPS or map sensor problem more than likely but could be dodgy wire some where best bet is to get a diagnostics done.

take it you changed from OFAB to OFAC and not from efi to OFAC.

Its on a mondeo, The TPS is the one i used with the STD management and is ok, Ive tried 2 MAP sensors too, Its an OFAC engine loom merged with a mondeo engine loom, Ive checked the wiring a few times and it all seems to be good, Just to be sure Im gonna check it again tomorrow

[kezrs1800]

what inlet u using?
the mondeo and cvh turbo TPS are different think u need to change two of the wires around- try fitting cvh TPS though

[kezrs1800]

arrr just seen you pics ur running zetec inlet - think the zetec tps wont work with OFAC or OFAB (may be wrong) so think you need cvh TPS. cant remember if the go the opposite way or if that was the 24v TPS that did.

like i said i may be wrong but you may be able to change two wire on TPS and get it to work. had a similar prob on MFI to EFI conv- what injectors u running?

may be eaier to switch to Efi inlet with Beige injectors

[Avinitlarge]

Im using 370cc injectors, Ive checked the wiring over and over again, All is good, Any body know what value the CVH TPS is (resistance across the end 2 pins of the TPS with the plug disconnected)??

[Avinitlarge]

Ive had the loom on my bench at work running from a power supply, I thought the 5V reference voltage may be missing but its there. Now im really confussed

[Avinitlarge]

Tested a spare injector loom with a throttle body and TPS with my OFAC loom on the bench, It works fine, Gonna test it with my injector loom and TPS tomorrow to see whats going on

[Avinitlarge]

Ive checked my OFAC/Mondeo engine loom twice today just to be sure, The loom is all good, Still stick with my problem with not reving, Im starting to get really stresed about it now, Any ideas???

[Project]

Likely to be massively under- or over-fuelling when it's revved. If the management is standard (unchipped) try running a set of RS2000 side fed injectors on the standard Zetec FPR and fuel rail (if it's end-fed try something for around the 210bhp-max mark) if you can grab some.

Failing that can you limp it to a tuning/mapping company (e.g. MSD in Blackpool).

/al

[Avinitlarge]

Likely to be massively under- or over-fuelling when it's revved. If the management is standard (unchipped) try running a set of RS2000 side fed injectors on the standard Zetec FPR and fuel rail (if it's end-fed try something for around the 210bhp-max mark) if you can grab some.

Failing that can you limp it to a tuning/mapping company (e.g. MSD in Blackpool).

/al

Got summat a bit better than RS2000 injectors , Anyway, IMHO I really dont think its down to chipping or owt like that. Its like when im pressing the throttle it not putting any more fuel in as if the ECU hasnt realised the throtle had been pressed

[Avinitlarge]

Just to double check, Pins 3 & 4 on the ECU, Where do they go to, Ive got 2 different diagrams

[Avinitlarge]

ANYWAY........

I am back to fitting the OFAC system on my car, Had the loom on the bench at work, MAP sensor gives a nice square wave and alters with vacuum and pressure, Every thing checks out ok, Just to double check, What pin on the ECU does the MAP sensor signal pin go to???

[Avinitlarge]

MAP sensor gives a nice square wave and alters with vacuum and pressure

Also found out from doing this that the Escort Cosworth MAP sensor give the same reading as the OFAC MAP sensor

Anyway.....

Ive found a genuine OFAC engine loom and checked all of the wires/ecu pins, This is what I found

1, Red - +12 KAM (ECU memory)
3, Brown/Yellow – octane / idle adjust
4, Brown/White – speed sensor
7, Brown/Green – engine temperature sender
16, Brown – Gnd
17, Brown/Green – diagnostics connector
20, Brown – Gnd
21, Brown/Yellow – idle speed valve
22, Brown – fuel pump relay
23, Brown/Red – octane / idle adjust
24, Brown/Blue – octane / idle adjust
25, Brown/Yellow – air temp sensor
26, Brown/Black – throttle sensor & co adjust pot & map sensor
27, Brown – CO adjust potentiometer
33, Brown/Green – Boost control valve
36, Blue/Red – Pin 3 on edis
37, Black – idle speed valve & injectors & Speed sensor & Boost control & 57 (switched 12V)
40, Brown – Gnd
45, Brown/Yellow – map sensor
46, Brown – map sensor & engine temp & air temp & throttle & CO adjust
47, Brown/Green – throttle sensor
48, Blue/Green – diagnostic connector
56, Blue/Yellow – Pin 1 on edis
57, Black – idle speed valve & injectors & Speed sensor & Boost control & 37 (Switched 12 Volts)
58, Brown – Injectors
59, Brown – Injectors
60, Brown – Gnd