For some time, I have had a problem with my 740 Turbo intermittently cutting out during hard acceleration. It is most apparent in first gear but it sometimes happens in some of the other lower gears as well.

I am not revving the engine up enough to engage the 6000-rpm redline limiter when this happens although the heistation feels very much as if I were.

During normal driving or overtaking manouvers, the car runs perfectly.

I have had a couple of topnotch Volvo specialists look at it but so far no one has been able to pinpoint the cause of the problem. Of course it generally seems to choose not to cut out just at the moment when I need it to (meaning when I am trying to get someone to troubleshoot the problem).

This is a one-owner car (myself) so I am very familiar with its history.

If it helps, this particular car has a manual transmission.

Any ideas on this one?

Is it possibly correlated to fuel tank level? If so, possibly transfer pump trouble, assuming you have one.

Flint 83/88 245

In addition to Rene's excellent comments may I add that if tach falls off dramatically it could also be the power stage. Also if this problem occurs only during high fuel demand have you considered the fuel filter?

First things first: Re-solder or get a new fuel pump relay. As they age, the soldered contacts crack and you get an intermittent cutting out.

Rene
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1988 745 GLE B230F M46. Toronto. 370000Km. Suspension upgraded and lowered (B23FT ready for installation). 1982 242 GLT project (B23ET LPT to be included) Also in charge of GF's 1986 244

Go for a drive and keep your eye on the tach. If the needle drops when the engine cuts out, there is a problem with your hall sensor. The hall sensor is in the distributor, at the back of the head. Get that step out of the way and go from there.

Rene
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1988 745 GLE B230F M46. Toronto. 370000Km. Suspension upgraded and lowered (B23FT ready for installation). 1982 242 GLT project (B23ET LPT to be included) Also in charge of GF's 1986 244