Hi, help required in diagnosing the following problem.
Vehicle particulars, Volvo 760, 2.3 turbo petrol, 1988. with the engine warm or cold, when changing gear down to slow down, with clutch depressed - the engine either drops revs to 500 rpm momentarily or engine cuts out completely. Unsure as to reason, all help appreciated. New owner / novice mechanic (very novice, got Haynes manual, but dumbfounded).
Thanks in advance
Mark
From a point at sea, to the circles of your mind, this is Mark:
Also worth mentioning, that as you appear to be UK based, you probably have the Motronic fuel injection system. Unfortunately this is a system I know very little about; someone around here may know more. Change the airfilter and spark plugs are a couple of obvious starting places. Also check for induction leaks downstream of the air-flow meter.
I'm also guessing that you've got the newer version of the Haynes manual (blue cover), and I too am dumbfounded by it. If you can turn up the older edition for this model (black cover - I got mine from eBay), which still covers your model year, it is a much more informative book. Why they had to change it is a mystery to me. In the new edition, Motronic gets a single page, compared to 7 pages in the old edition, including some good schematic diagrams of how it works in conjunction with the turbo.
The intermittant temperature gauge (and fuel gauge) is very common on the 700 series. My answer is to give the dash a whack to wake them up.
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.