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Progressively Worse No Start Condition (what next?) 200 1981

uid 18083's pic
posted by  lucid on  Fri Jul 11 13:53 CST 2003
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Sounds like maybe a fuel problem. Here are some things to try:

You have a new Fuel Injection relay, but do you know it's "picking" when you crank ? You should be able to feel it click. It takes 2 things: +12v from Fuse 13 (i think) to the relay coil, then pulses from the ground side of the IGNITION coil to ground the relay coil.

You could (as a quick test) force the pumps to run by connecting a temporary jumper from fuse 7 (left side, nearest door is always hot. right side is hot if fuse/contact is good) to fuse 5. Voltage applied at F5 will go both ways--"backwards" via left terminal to run Main pump, right terminal to run the prepump.

Also, there is the Lambda Relay on the left fender rail near headlight flasher. It must be "up" to power the Lambda CU and Frequency Valve, It gets picked by the FI (more than just a pump) relay. And does the FV buzz/vibrate? It should, if the CU is trying to regulate mixture.

Hope this helps,
--
Bruce Young, 940-NA, many 240s (one V8), '73 142, '71 144 (ex circle track car in CT), '67 144 (new), used 122 from '63 to '67






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