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Bosch pump replaced with Bosch 200 1990

Drive to work this morning (humid and raining) was great. No hiccups, no hesitating..just the usual solid drive I am used to. Maybe the computer had to "re-learn" getting a steady signal to the fuel pump (after all this time with the two pump wires tapping each other and/or ground over every bump in the road).

Nabisco - I have a spare LH3.1 computer I have been thinking about swapping in, just to check. With the problem being so intermittent, I think I'd rather diagnose the cause of the symptom, and see if that could be ECU-related.

Art - I was thinking the same thing about Bosch pumps. I'm not going to cut it open - if I have time, I will use the little variable power supply I have and a container of gasoline to see how the 'ole pump fares.

Regarding fuel pressure testing: I have a '93 fuel rail with the schrader valve, but I don't think it will let me have the cold-start injector. Is that an issue? If not, I'll just swap that in and use the schrader port.

If it is an issue, maybe I should just go ahead and buy a fuel pressure tester kit (like this: http://wiseautotools.com/ta58012-volvo-14mm-lh-jetronic-adapter-with-quick-coupler/). I don't think I will have time to make a tool.

Michael






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