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1986 Fc Will not idle but will rev

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Old 03-13-22, 02:50 PM
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Question 1986 Fc Will not idle but will rev

A few weeks back my cars belts were squeaking so I replaced the belts and after I put everything back together It would only rev but would not idle , if I let go of the throttle it would just slowly die down the revs till it turned off.
Im am not sure what I did , I assume I just nudged something important as it worked before I did the job but I don't know where to look lol.
Any help would be appreciated or just a link to another thread that answers my problem .
Thanks
Old 03-14-22, 07:21 PM
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welcome to the board.

you probably dislodged or broke a vacuum hose and now have a leak somewhere. i would start there.

do you have a copy of the FSM? if not, you can get one from: Foxed.ca

Old 03-15-22, 12:47 AM
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Originally Posted by diabolical1
welcome to the board.
you probably dislodged or broke a vacuum hose and now have a leak somewhere. i would start there.
do you have a copy of the FSM? if not, you can get one from: Foxed.ca
Please note that he is in the UK. European S4NA's have a N323 ECU which uses a distributor like the GSL-SE. Wiring will be a bit different due to this too. Just so we're all on the same page, could you please get a picture of the engine bay?
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Old 03-15-22, 12:59 PM
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Before I put everything back on
Old 03-18-22, 01:36 AM
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That's definitely a European-spec Series 4 NA, N323 ECU. HIGGI is our resident European expert, but I know Series 4 and its variations fairly well too. Is there a vacuum line anywhere on the Distributor? My hunch is that the Spark Advance mechanism is acting up, in the manner that it is not returning to Base timing when you let off the throttle. I'm taking a guess here, but I have a feeling that the N323 Distributor setup was carried over from the GSL-SE but I'd like to confirm it before saying "there, it's that" as I'm a bit lacking in the book knowledge on First Gens.

Might sound like a silly idea, but recording a video of everything around the distributor would help get us on the right direction as far as how to address this. For most of us, this is the first time we've seen a N323 car.
Old 03-19-22, 05:10 PM
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I know this may sound dumb but if the distributors on those can be clocked to time it try and rotate It around to see if you can get good idle going
Old 03-20-22, 12:05 PM
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Originally Posted by Akagis_white_comet
That's definitely a European-spec Series 4 NA, N323 ECU. HIGGI is our resident European expert, but I know Series 4 and its variations fairly well too. Is there a vacuum line anywhere on the Distributor? My hunch is that the Spark Advance mechanism is acting up, in the manner that it is not returning to Base timing when you let off the throttle. I'm taking a guess here, but I have a feeling that the N323 Distributor setup was carried over from the GSL-SE but I'd like to confirm it before saying "there, it's that" as I'm a bit lacking in the book knowledge on First Gens.

Might sound like a silly idea, but recording a video of everything around the distributor would help get us on the right direction as far as how to address this. For most of us, this is the first time we've seen a N323 car.
is this video alright ? I don’t mind taking another if that one was bad .

Last edited by fcbenn_; 03-20-22 at 12:11 PM.
Old 03-20-22, 02:56 PM
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I think this video works.
Attached Files
File Type: mov
IMG_2050.mov (5.09 MB, 6 views)
Old 03-20-22, 07:54 PM
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Originally Posted by Brrraaap
I know this may sound dumb but if the distributors on those can be clocked to time it try and rotate It around to see if you can get good idle going
not dumb at all. it's just that it seems to have been running fine until he did the belts, so it's not likely the timing shifted unless he shifted it.
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