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Hi all,
I have just bought a 1975 Ford Pinto station wagon with a Cologne 2.8 v6 engine and auto box. The engine has at some point been changed from carb to fuel injection. The cars starts and idols well in neutral but when in gear will not idol, the car runs great at speed. There is no ecu or ecm that I can see. Any ideas as this is frustrating to say the least. I think it could be a bosh injection system |
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I would try jacking up both drive wheels and then put it in drive and see if it idles. If it does it could be a gearbox/converter problem. You could also check the idol control valve. I presume it will be something vacuum operated on the side of the plenum chamber it could be stuck. Does it stall if you put a lot of electrical load on the engine (lights fan heater) or air con if you have it?
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Thanks for the advice TBH I have literally just got it and have not really had a chance to check it all out. I will check the electrical load and see if it cuts out. Yes there is an a/c unit on it and the belt is attached - not sure if the a/c works
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Only asked about the AC to put a load on the engine to see if the idol control valve compensates for it but electrical load will do the same. If you can get the injection idoling correctly it is worth sticking with as it is much more flexible than a carb setup and no choke to mess with. Let me know how you go on.
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Not sure if it's applicable to your engine box combination but some use a vacuum to increase the idle speed whilst in gear or under load (such as the a/c)
What speed is it idling at in neutral when it's hot? At a guess somewhere around 1000 rpm should stop it dying once in drive as it should drop to around 800 ish if there are no other adjustments going on.
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Had another look and drive tonight and it drives well and only dies when you pull up to a junction. It then takes full throttle to get it started again. I have found the ecu and its tucked behind the center consul so plug in diagnostic could be possible?
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Hi, When you pull up to stop after a run does the engine just simply peter out and die or does it feel loaded up and stalls? If it's stalled it maybe the torque converter lock up is not releasing. I'm not familiar with these g'boxes control, so is it kick-down cable or vacuum control? Using full throttle to start it is releasing the lock-up control somehow. Something to check.
Colin
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bortaf
Posted a lot
Posts: 4,549
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I take it it's a 2.8 EFI not MFi then ? a picture as allways would help  the EECIV on the early fords will only show a flashing LED to give the code, modern scanners wont plug in or work. I'd start with a leak test and cleaning the AFMs and thottle bodies personly, if it's MFI (pic) i'd be looking at the cold start injector on the plenham. |
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R.I.P photobucket
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Quick update - I removed the connector to the Idle Control Valve off and turned on the engine, then switched off and reconnected the connector and fired the engine. When put in drive it did not cut out and creeped forward when I took my foot off the brake. It did the same in reverse. Would doing this reset the ICV?
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Sounds like the ICV was stuck closed? It would be a good idea to remove it and give it a good clean out with some carb cleaner or similar.
Oddly I've never had one fail like that they have always stuck so the idle was way too fast .
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