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munroe.frost

New Member

• Mar 4, 2011

• #21

Right I fitted the air flow meter and no difference. There is a perfect vacuum and everything.

I think the problem lies with the LPG system. I have traced all the wiring and from the coil there is a box that adjusts the timing. Also the injectors are ran through the emulators (part of the LPG) So I don't thing the ecu is firing the injectors because the lpg system isn't working.

Now I bypassed the system to the lpg solenoids and it runs on the gas great so it's down to the LPG I think.

If anyone has any information for a iwema system it'll much appreciated.

Dave

 

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munroe.frost

New Member

• Mar 21, 2011

• #22

Found the problem!

It was the injectors, most of them are stuck open flooding the engine immediately. I've tried cleaning them to no avail, but I have a spare inlet manifold with carbs so I'll put that on instead till I get the new engine. Unless anyone has any spare injectors lying around?

Thanks for your help

Dave

 

3.5 efi

Well-Known Member

• Mar 26, 2011

• #23

you'll have to change the fuel pump to run carbs, far too much pressure with the efi fuel pump

 

discopaul

New Member

• Mar 26, 2011

• #24

there is a black and white cable that runs to ya ECU check this as this is the signal cable if there is a brake in the cable it wont start also on the wire there might be a small resestor take it off and try. Also the over run relay check that its working. some people cut it out as there a pain in the tits. That Black and wite cable is a show stopper!

If the plugs are very wet the 9th injector on the plenum chamber might be dripping as there ****. take of the fuel pipe to the 9th injector and block it off the (th injector only works when its somthing like -19

 

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munroe.frost

New Member

• Mar 27, 2011

• #25

Yea I've got a spare fuel pump from a 2.25 I used to have so that should be fine and serviced the carbs. Just waiting to hear if the injectors can be fixed. I hope so.

All the wiring is fine for the ecu. And I've re-wired all the injectors as well.
I've just got to work out how the pipes go for the carbs then I can go get my 3.9 .

Dave

 

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munroe.frost

New Member

• Mar 27, 2011

• #26

Blocked the fuel for the 9th injector ages ago. What I can gather is that the rubbers on the injectors are so perished that when I had it running little bits of rubber came off and went into them.