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91 245 hard start after fuel pump replacement 200

posted by  jon_h on  Thu Mar 27 16:06 CST 2008
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last visit: Fri Oct 24 11:57 CST 2014
[RELATED]

Just started driving a 91 245 that hadn't been used for 4 years and had some messy repairs.

Replaced plugs, wires, cap, rotor, in-tank pump (which had failed); serviced throttle body; replaced CPS; cleaned all fuses in interior block.

Drove yesterday and had no power + bad knocking.

Today I replaced main fuel pump and fuel filter, and spark plugs. Removed airbox flap. Re-tightened grounds.

Car has more power and doesn't knock but it's hard to start: requires 3-4 attempts before it will catch and stay running. It used to start right away - lean in, hit the key, 2-3 turns of the started and it was running smoothly at idle.

The pump I used is out of a 1986 240. Any chance the 91 pump had an internal check valve - vs the 86 pump which expects a separate in-line valve.





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