90 100Q cant rev past 5k under load

[Bernard Littau]

> I have a strange problem that seem to be slowly getting worse on
> my 90 100Q.
> The car starts and drives fine but it will not rev past 5000rpm
> from second
> gear on. I first noticed it on a trip a couple of months ago when
> accelerating on to the highway in third and attributed it to the fact that
> put 87 octane in it and the computer might have retarded the timing. I was
> able to redline in first and second gear. Took a long trip last week (300
> miles Rt) with 93 octane and did the same test running up through
> the gears
> from second. The car feels like it's hitting a soft rev limiter
> when it gets
> to 5k. In first it will got to redline and feels very quick for a big car
> with all of 130hp. I am suspecting the fuel pump relay but is
> there anything
> else I should check for.

This sounds like a fuel flow or fuel pressure problem.  When was the last
time you changed the fuel filter?

If a filter change does not cure the problem, there is a fuel delivery test
you can run.  I assume the Bentley for the 100Q will have the particulars.
A fuel pressure test would be in order after the fuel delivery test.

Best,

Bernard Littau
Woodinville, WA
'88 5ktq