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1988 s4 hard starting problem

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Old 09-21-2013, 09:16 AM
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Machknocker
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Default 1988 s4 hard starting problem

88 s4 intermittently won't start unless the accelerator pedal is depressed. .....after start idles and runs perfect. Any help with what this might be please? Car has 11k on it.
Old 09-21-2013, 10:11 AM
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Mrmerlin
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with the low miles you might consider pulling the vacuum lines from the dampers and the fuel pressure regulator smell for gas if no gas smell then,
adding some techron to the fuel as well as 8oz of MMO to the gas do lots of short runs so the chemicals have time to work, you probably have gummed up injectors.

Also check the coil wire ends for corrosion and make sure that the coil wires are not touching any metal on their runs as they can short out
Old 09-21-2013, 01:32 PM
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Machknocker
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Originally Posted by Mrmerlin
with the low miles you might consider pulling the vacuum lines from the dampers and the fuel pressure regulator smell for gas if no gas smell then, adding some techron to the fuel as well as 8oz of MMO to the gas do lots of short runs so the chemicals have time to work, you probably have gummed up injectors. Also check the coil wire ends for corrosion and make sure that the coil wires are not touching any metal on their runs as they can short out
Ok, thanks....
Seems to have gone away as quickly as it came ......just driving it all of yesterday and this am ...coil wires are good....
Old 09-21-2013, 06:28 PM
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Machknocker
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Put 4oz of mmo in and went for a ride...it's even smoother at idle now! Owe you one thanks!
Old 09-22-2013, 08:17 AM
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7391420
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what is MMO?
Old 09-22-2013, 09:25 AM
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Bertrand Daoust
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Marvel Mystery oil.

http://www.marvelmysteryoil.com/



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