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    Bad Idle Surge on '88 Fox w/Mods

    rog, will give it a shot.
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    Bad Idle Surge on '88 Fox w/Mods

    wow, i am dumb, you can't have vacuum with the engine off, so now i did my fuel pressure with the engine running and low and behold, makes about a 6 psi delta when you put on or take off the vacuum line. so now the fuel pressure is for sure set right, but car is still having problems. sorry...
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    Bad Idle Surge on '88 Fox w/Mods

    also, just on my mind just now is that when i test the fuel pressure, i get the same reading whether or not the vacuum hose is on or off the fuel pressure regulator. is that normal? i have 24 lb injectors running at stock 39 psi fuel pressure.
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    Bad Idle Surge on '88 Fox w/Mods

    sensor is a year old and yes, it does run to the heater core (a vintage "under-dash" heater, not stock). Edelbrock RPM Performer II upper and lower intake.
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    Bad Idle Surge on '88 Fox w/Mods

    by the way, do you know where the idle air bleed screw would be by any chance?
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    Bad Idle Surge on '88 Fox w/Mods

    well, i redid the KOER test with a fully heated up car....still got the 21. see attached pic of how the ECT sensor is rigged up.
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    Bad Idle Surge on '88 Fox w/Mods

    car was borderline warm...will redo it right now to rule things out...how long u going to be online tonight- and thanks for the help with this. what do you think of the other codes? v/r dan
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    Bad Idle Surge on '88 Fox w/Mods

    wow, actually got the KOER codes this time: Results: 21 R: Cooling Temperature sensor out of specified range or ECT out of range 94 R: Air diverter solenoid circuit fault 44 R: Thermactor air system fault ...is the thermactor air system fault for the smog controls? if so, i...
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    Bad Idle Surge on '88 Fox w/Mods

    yah, i tried the KOER 6 months ago and it wouln't do squat....will give this a try...also, maybe i should have mentioned, i gutted out all the A/C 'cause it didn't work, and i like having sweaty balls while i drive :). maybe something needs to be done with a loose end there somewhere/how too...
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    Bad Idle Surge on '88 Fox w/Mods

    manual....and it was in neutral
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    Bad Idle Surge on '88 Fox w/Mods

    K, well, the ECT isn't the problem then, cause it is in coolant flow....here are the codes i pulled with key on, engine off: 67 O: Manual Lever Position sensor out of range or A/C input high 95 O: Fuel pump secondary circuit failure 29 C: Insufficient input from Vehicle Speed Sensor...
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    Bad Idle Surge on '88 Fox w/Mods

    going to pull the codes and see, also, i did put in a new coolant temp sensor....i have a jimmy-rigged heating system and so the coolant temp sensor is rigged up and suspended in-line two heater/coolant hoses (does it need to make metal ground-contact with the car maybe?)
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    Bad Idle Surge on '88 Fox w/Mods

    hey, this is Dan with a modified '88 fox...tried to do the set-idle checklist, but having problems...no chance of sustaining idle with IAC unplugged without lots of throttle...background: Edelbrock RPM perfomer II upper and lower intake, MAF conversion, 24 lb injectors set at 45 psi, 24 lb cal...
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    jumpy idle

    me again well, i reset the TPS and it read .94, ran the car, and then it read .955, ran it again without touching anything, and now it reads .971. so at least that looks good, but the idle surge is really bad yet and just hard to run the car even with the IAC plugged in.
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    jumpy idle

    trouble setting idle, etc. hey, this is Dan with a modified '88 fox...nice info, but having problems...no chance of sustaining idle with IAC unplugged without lots of throttle...background: Edelbrock RPM perfomer II upper and lower intake, MAF conversion, 24 lb injectors set at 45 psi, 24 lb...
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    1988 Manual MAF Conversion

    thanks man, will get to it this weekend...like too many of the few in this country who pull all the weight, I am task-saturated at work and going insane///insaner, so might be a bit before I have time to re-attack this car problem. hey, that is a funny skit thing you got there on your profile!
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    1988 Manual MAF Conversion

    I will, but that will take some do'in right now and a little recon...i will post back again as soon as i can...also, i used connectors vice soldering...would that make any difference? I doubt it, but just checking in.
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    1988 Manual MAF Conversion

    howdy...quick reply...A3M1 computer (same as A9L I'm told)...oh yeah, i unplugged the vac from the MAP and plugged it.
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    1988 Manual MAF Conversion

    Hey all, maybe you can help me out here...got an '88 hatchback, manual tranny...having problems with my MAF conversion. Problems: 1. Runs really really rich 2. BAD idle surge (already checked/replaced all other components possibly related to idle surge) 3. Not running near as strong as...
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    Idle surge trial and errors

    Well, i was finally able to get a key on engine running test and guess what, she's been running in "Failure Mode"....a code 98 accompanied by a code 51 (ECT sensor out of range/circuit open), so that is what i need to fix first. Do I need to put the ECT sensor back in (remember, i gutted the...