86 hiccup
Thread Starter
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
86 hiccup
I let my86 sit for 3 weeks.
it starts, runs 5 seconds, shuts off by itself.
put a g as yge on fuel rail, 45 psi till it stops, then ecm turns off the pump, drops a little.
unplugged pink wire on dist, gurned on key, 12.5 volts.
engine starts, won’t stay running
nut 3 weeks ago, it ran fine
any ideas?
going to change dist. Cap wit a coil ( cause i have a spare)
then ecm ( cause i have a spare)
i have a gas can, so i put. 3 gallons in it in case.
just changed rear axle and batwing
it starts, runs 5 seconds, shuts off by itself.
put a g as yge on fuel rail, 45 psi till it stops, then ecm turns off the pump, drops a little.
unplugged pink wire on dist, gurned on key, 12.5 volts.
engine starts, won’t stay running
nut 3 weeks ago, it ran fine
any ideas?
going to change dist. Cap wit a coil ( cause i have a spare)
then ecm ( cause i have a spare)
i have a gas can, so i put. 3 gallons in it in case.
just changed rear axle and batwing
Safety Car
Joined: May 2001
Posts: 4,759
Likes: 1,647
From: Fairfax Virginia
I would probably start at the Fuel Pump Relay and follow the power. It might be best also to check the wires near the distributor and rear of the plenum as the oil pressure switch If that doesn't.
Sounds like it is priming but not continuing to run? Is that what you are describing pretty much?
Sounds like it is priming but not continuing to run? Is that what you are describing pretty much?
Racer
Joined: Mar 2020
Posts: 387
Likes: 148
From: Langton, Ontario, Canada
2025 C4 of the Year Finalist - Unmodified
If memory serves, the fuel pump comes on with the key for 5 seconds, then shuts off, until engine oil pressure indication allows it to turn back on. It sounds like it's not getting an oil pressure signal.
Thread Starter
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
No run
Found problem
intake bellows split open on the bottom.
apparently air through mass air did not match with parameters in ECM, and computer kept shutting off engine.
who looks there when you’re troubleshooting the fuel system
intake bellows split open on the bottom.
apparently air through mass air did not match with parameters in ECM, and computer kept shutting off engine.
who looks there when you’re troubleshooting the fuel system
Last edited by coupeguy2001; Jul 11, 2021 at 06:14 PM.
