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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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740 poor running and stallingViews : 21163 Replies : 119Users Viewing This Thread : |
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Dec 6th, 2021, 19:03 | #111 | |
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Hopefully it's something fairly simple from here, most likely is it started misfiring before it was laid up and has got worse since. They probably tweaked the mixture screw to get it through MoTs before that so it's running as rich as anything now. On my 760, i had similar (although that's LH-Jetronic) because my injectors were dirty. When i replaced them with some Vauxhall Omega V6 injectors (cross-referenced to the Bosch replacements for the OE injectors, then found the GM V6 used the same injectors!), the performance was vastly improved, however the idle CO shot up from ~1% to about 9%! I tweaked the mixture screw on the MAF to get it back to where it should be and still had improved performance, response and economy, hence my suspicion about what's happened with yours.
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Dec 9th, 2021, 15:55 | #112 | |
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Last edited by Beadybc; Dec 9th, 2021 at 15:58. |
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Dec 9th, 2021, 17:19 | #113 | |
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Dec 9th, 2021, 17:54 | #114 | |
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Last edited by Beadybc; Dec 9th, 2021 at 18:04. |
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Dec 9th, 2021, 17:59 | #115 | |
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I'm not a fan of WD40 as a penetrating fluid, i prefer a 50/50 mix of acetone and synthetic ATF. I'm wondering if it was in fact water that was in that tube and it's partially seized teh adjuster?
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Dec 9th, 2021, 18:09 | #116 | |
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Dec 9th, 2021, 18:18 | #117 | |
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I put it in my "(Get me out of the) Sh!t Kit" toolbox and there it has stayed for the past 5 years or so!
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Dec 9th, 2021, 19:07 | #118 | |
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Dec 21st, 2021, 17:07 | #119 | |
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Dec 23rd, 2021, 16:32 | #120 |
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I'm not a fan of WD40 as a penetrating fluid, i prefer a 50/50 mix of acetone and synthetic ATF. I'm wondering if it was in fact water that was in that tube and it's partially seized teh adjuster?
Agreed. WD 40 is a water displacement and nothing else. Despite what it claims, people think its a magical cure for most things. If you use it to lubricate when things are moving then great. Plus gas is a penetrant/release agent or as Scooby says 50/50 of his magical mix is far better than WD 40 |
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740, 940, b200e, stalling, throttle lag |
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