idleing to low to run. April 17, 2008, 03:37:17 PM so we're haveing a problem with the computer idleing the car to low to run as in it dies.when i first start it it runs fine but the rpms start to drop then it dies .could it be possible that becuase it doesnt have o2 sensors thats why its dying?the reason it doesnt have the o2 sensors is we cant find the right harness for the sensors we have . car is the one in my sig. Quote Selected
idleing to low to run. Reply #1 – April 17, 2008, 05:05:17 PM Hit the salvage yards and get the harness and hook up the O2 sensors.they are there for a reason. Quote Selected
idleing to low to run. Reply #2 – April 17, 2008, 06:00:33 PM we've hit the yard weve only found 1 and it was wrong.we might go look at one tommorow. Quote Selected
idleing to low to run. Reply #3 – April 17, 2008, 08:32:53 PM Quote from: vinnietbird;214462Hit the salvage yards and get the harness and hook up the O2 sensors.they are there for a reason.But it isn't to let the engine idle...You likely have a idle air bypass problem... Is this thing still CFI???Checked any codes or the base idle, how much vacuum is it pulling at idle??? What cam is in it??? Quote Selected
idleing to low to run. Reply #4 – April 18, 2008, 12:43:39 AM Quote from: TurboCoupe50;214492But it isn't to let the engine idle...You likely have a idle air bypass problem... Is this thing still CFI???Checked any codes or the base idle, how much vacuum is it pulling at idle??? What cam is in it???sorry for not stating it has sefi from a 90 mustang,wiring under dash and hood from a 87 cougar as far as we know it has been rebuilt but it proble has the original cfi cam,it was a really cheap rebuild from wat we know its bored .040 over has a e7 and an e5 heads on it .thats all we know also it not a roller block its flat tappet i want to pull it and have a roller block rebuilt .dont have a code reader ,or a vacumn gauge. Quote Selected
idleing to low to run. Reply #5 – April 18, 2008, 10:39:52 AM Quote from: superpinto;214523has a e7 and an e5 heads on it Whaa? About the cam, have you checked which firing order it has (HO/nonHO)? As for the 02s, I lengthened mine by using heat shrink tubing, solder, Teflon wire, and some zip ties to keep them off the exhaust. I agree with TC50. Do the normal things, Set your TP, base idle, and search for vacuum leaks. Quote Selected
idleing to low to run. Reply #6 – April 18, 2008, 11:28:33 AM Frankenstein called.....He wants his motor back.....Quoteit has sefi from a 90 mustang19 pound injectors with that cam are too muchQuotehas a e7 and an e5 heads on it One of each!?Quotedont have a code reader ,or a vacumn gaugeGET THEM!!!! Quote Selected
idleing to low to run. Reply #7 – April 18, 2008, 04:47:55 PM IF it has a SO 15426378 firing order, you'll likely be better off running it on a SO EEC... As Paul mentioned the 19lb inj are too much but can be used, if you inst a adjustable fuel pressure regulator and cut the pressure back to 33-35lbs... No, I don't suppose you have a fuel pressure gage either, so now you're shopping for fuel and vac gages and a code reader... BTW you can get by without the reader, but you'd need to learn the procedure for checking codes using a meter or test light(I'm assuming the '85 does not have a working Check Engine Light)... But then you probably don't have those either, so you're gonna have to park it till you scrounge up some test equipment... Sorry that's the cold hard facts... Quote Selected
idleing to low to run. Reply #8 – April 19, 2008, 01:24:30 AM the car is parked and has only time it has movedin the last year is either when i push it or the one time i drove it about 10 feet and back thanks for not "sugar coating it" super coupe and thanks to the rest of the peoples who have responded or respond. Quote Selected
idleing to low to run. Reply #9 – April 19, 2008, 09:19:07 AM Concentrate on the vaccum gage, IF the engine won't pull at least 16" of vac, at 650 rpms, it will never run correctly on a SD EEC of any type... Of course spark plug wiring and timing must be correct to judge amount of vacuum... Check Places like Harbor Freight for the vac gauge and possibly the code reader... I know Equuis is marketing a inexpensive EEC-IV code reader for about $30, and a vac gauge should cost half of that... The fuel pressure gauge setup for a Stang would be fine, maybe you can find one of those and an adj regulator(I may have one) form the Stang crowd... I defiantly have a '87 SO EEC... Quote Selected
idleing to low to run. Reply #10 – April 19, 2008, 06:16:19 PM we may know were an ho motor and computer is Quote Selected
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