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1990 740 gle gas delivery problem?

Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

1975 - 1993 240
1983 - 1992 740
1982 - 1991 760
1986 - 1991 780
1990 - 1998 940
1990 - 1998 960
1997 - 1998 V90/S90

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joedrt77
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Year and Model: 1990 740 gle
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joedrt77

Re: 1990 740 gle gas delivery problem?

Post by joedrt77 » Sat Nov 12, 2016 3:48 am

Thanks, going to try to isolate the sensors.

joedrt77
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Re: 1990 740 gle gas delivery problem?

Post by joedrt77 » Sat Nov 12, 2016 9:28 am

Tried unplugging sensors, no change, could the squealing sound from the 2.4 ecu be caused by a bad ground? thanks.

joedrt77
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Re: 1990 740 gle gas delivery problem?

Post by joedrt77 » Sat Nov 19, 2016 7:57 am

Still have the ecu squealing, but after those new parts and a rsr relay and connector replace and the aux. one next to it, just used a 5 pin relay and left off 87a which is for normally closed, taped it off, which is not needed. car is not stalling anymore. would like to fix the ecu squeal but don't know how. Thanks for the help Lummert.

joedrt77
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Re: 1990 740 gle gas delivery problem?

Post by joedrt77 » Tue Nov 22, 2016 12:44 am

Odd, when I turn the heat selector all the way right, full defrost setting, the ecu squeals constantly but when it's in the other 2 or 3 positions it doesn't squeal at all and when the heater is set to off, ecu squeals, very strange.

lummert
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lummert

Re: 1990 740 gle gas delivery problem?

Post by lummert » Tue Nov 22, 2016 12:24 pm

Verify where the noise is coming from.
1988 Volvo 760 Turbo Wagon

joedrt77
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Re: 1990 740 gle gas delivery problem?

Post by joedrt77 » Tue Nov 22, 2016 2:14 pm

it's from the ecu.

lummert
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Re: 1990 740 gle gas delivery problem?

Post by lummert » Tue Nov 22, 2016 8:32 pm

One thing ecu related to the heater would be to increase idle speed when running the a/c.
1988 Volvo 760 Turbo Wagon

joedrt77
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Re: 1990 740 gle gas delivery problem?

Post by joedrt77 » Wed Nov 23, 2016 4:46 pm

Are the front bearings the non service type on these?, it has the axle nut that you hit to secure it, got it off with lots of effort, no cotter pin type nut. I took it apart and can see the bearings, the bearings that auto zone had, that was suppose to match, seem way off in size and form, for about 20 more bucks can get the whole unit, not from az of course. Not even sure if they're bad, they seem to be howling, wonder if they just need repacked, maybe someone over tightened them, not sure.

joedrt77
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Re: 1990 740 gle gas delivery problem?

Post by joedrt77 » Mon Dec 05, 2016 3:12 pm

Trying to figure out which carrier bearing and support I need for it, the driveshaft is 2 inches diameter.

lummert
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Re: 1990 740 gle gas delivery problem?

Post by lummert » Mon Dec 05, 2016 5:07 pm

Center support bearing for 1990 740 GLE:

AZ = 109FF

Volvo 1340501 and 183265 fits models with 50.8 mm diameter driveshaft. Bearing measures 45 mm ID x 75 mm OD. 1340501 is the support. 183265 is the bearing.
1988 Volvo 760 Turbo Wagon

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