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740 GL computer problems
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#11
 
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Re: 740 GL computer problems -
04-15-2009
, 09:29 PM
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F Murtz wrote: F Murtz wrote: MasterBlaster wrote: "James Sweet" wrote: 1990 740 GL Earlier today it stopped then I got it to idle.It would idle for ages but every time i accelerated it stalled, then I managed to start it at high revs which it would maintain but would stall when revs dropped. Have you tried unplugging the air mass meter? It's a common problem that causes exactly those symptoms. Is that the wide flat plug near the air cleaner and do you leave it unplugged temporarily? Yes, and yeah, it won't run right with it unplugged, Of course, you're assuming he's got the Bosch fuel injection system. My 1990 740GL is Rex/Regina, and doesn't have an air mass meter, just an intake air temp sensor (as he said) "near the air cleaner". I guess it depends on how wide his "wide flat plug" is. Continuing saga,(I think it is regina)In the morning it kept conking out over and over again with me disconnecting wait 5 min restart go a bit conk out. not all morning but about 1 1/2 hours then it started and went for the rest of the day no trouble. So I think it is going to be murder to diagnose. The plug near the air cleaner is wide and flat attached to a square thing in the air intake near the cleaner it does not look like the small temp sensor in a round air intake pipe that is in the picture of regina engine but the rest looks like regina layout PS disconnecting it did not alter its conking out behaviour An air mass meter looks like this http://www.swedishautoparts.com/shop/catimages/Volvo-Air-Mass-Meter-8111207.jpg Is your check engine light on? I believe 1990 is new enough that it should have OBD. Thats what it looks like And fault code says temp sensor but car has |
#12
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James Sweet wrote: F Murtz wrote: F Murtz wrote: MasterBlaster wrote: "James Sweet" wrote: 1990 740 GL Earlier today it stopped then I got it to idle.It would idle for ages but every time i accelerated it stalled, then I managed to start it at high revs which it would maintain but would stall when revs dropped. Have you tried unplugging the air mass meter? It's a common problem that causes exactly those symptoms. Is that the wide flat plug near the air cleaner and do you leave it unplugged temporarily? Yes, and yeah, it won't run right with it unplugged, Of course, you're assuming he's got the Bosch fuel injection system. My 1990 740GL is Rex/Regina, and doesn't have an air mass meter, just an intake air temp sensor (as he said) "near the air cleaner". I guess it depends on how wide his "wide flat plug" is. Continuing saga,(I think it is regina)In the morning it kept conking out over and over again with me disconnecting wait 5 min restart go a bit conk out. not all morning but about 1 1/2 hours then it started and went for the rest of the day no trouble. So I think it is going to be murder to diagnose. The plug near the air cleaner is wide and flat attached to a square thing in the air intake near the cleaner it does not look like the small temp sensor in a round air intake pipe that is in the picture of regina engine but the rest looks like regina layout PS disconnecting it did not alter its conking out behaviour An air mass meter looks like this http://www.swedishautoparts.com/shop/catimages/Volvo-Air-Mass-Meter-8111207.jpg Is your check engine light on? I believe 1990 is new enough that it should have OBD. Thats what it looks like And fault code says temp sensor but car has been working since I got it with fault light on |
Well if you have a temp sensor fault code, then I would definitely start
with the temp sensor, if it has no signal from that it will run very
rich. Change that part and go from there.
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