1990 740 gle gas delivery problem?

joedrt77 · Post by **joedrt77** » 06 Nov 2016, 15:43

Read somewhere, that said unplug all sensors, see if it starts, then plug them back in one at a time, does that make sense or will it not start because they're all unplugged? thanks.

joedrt77 · Post by **joedrt77** » 07 Nov 2016, 07:05

Got it starting, getting a squealing sound from the 2.4 ecu on the passenger kick panel.

joedrt77 · Post by **joedrt77** » 07 Nov 2016, 08:01

15 seconds after starting fuel ecu starts squealing, next start it started squealing at about 40 seconds after starting.

joedrt77 · Post by **joedrt77** » 07 Nov 2016, 08:03

Would a junkyard replacement ecu have to be programed?, thanks.

lummert · Post by **lummert** » 07 Nov 2016, 11:09

joedrt77 wrote:Would a junkyard replacement ecu have to be programed?, thanks.

I would think not. It's not that sophisticated.

Some more reading:

http://www.volvoclub.org.uk/faq/EngineFIComputer.html

http://www.nuceng.ca/bill/volvo/volvohome.htm

joedrt77 · Post by **joedrt77** » 08 Nov 2016, 07:13

looks like it calls for 0 280 000-517, while looking they also list 967 and 937, wonder if they would work? thanks. If i wasn't so dense, I would try the green fuel relay workaround but can't grasp it.

lummert · Post by **lummert** » 08 Nov 2016, 12:35

517? is that a typo? Should be 571 or 928 for B234f.

joedrt77 · Post by **joedrt77** » 09 Nov 2016, 10:54

Oops, was a typo.

joedrt77 · Post by **joedrt77** » 11 Nov 2016, 13:39

Got a 928 ecu from salvage yard, this ecu is making the exact same squealing noise and stalls after a few minutes of idling, effn unbelievable. Wonder if it's a common fault with these ecu's?

lummert · Post by **lummert** » 11 Nov 2016, 15:36

Maybe either a wiring or a sensor issue.