Hi folks
Maybe it's just me, but my 91 MX-5 seems to lack power and acceleration as
compared to when I purchased it 2 1/2 years ago (not to mention poorer gas
mileage). The odometer "shows" 92,800K's, had air filter and plugs changed
at 84,200K (at least that's what the invoice says), ignition leads changed
a few weeks ago, and the oil with filter last changed at 89,000K. A new
clutch was required at 75,200K. PS: I tend to have a "lead foot" with most
of the last 8,000Ks Urban/City driving.
Can anyone suggest any tests that a garage can perform (not too expensive
please) or road tests that I can perform (acceleration/time trials
maybe???) so I can relax knowing its my mind, and not the car, that's
aging???
Regardless as to whether the problem is the former above, are there any
fuel/oil, etc additives or other tips anyone has found that tends to
improve performance short of installing a turbo?
Thanks in advance
Bill
Lacking UMPH
-
- Need, more, 5-ing, time....
- Posts: 100
- Joined: Sun Jun 04, 2006 3:24 pm
- Location: Wellington
Lacking UMPH
Bill,
Have a talk to Howard, he has my G-tech. Running a few checks with that in
your car and comparing with a similar car will tell you if yours is abnormal
Gary
Have a talk to Howard, he has my G-tech. Running a few checks with that in
your car and comparing with a similar car will tell you if yours is abnormal
Gary
-
- Black is the new black.
- Posts: 601
- Joined: Thu Apr 13, 2006 11:20 pm
- Location: An Eastern Beach
Lacking UMPH
haven't managed to use it yet - didn't get to the last event as I was
planning. We are possibly going to run some stock 1.6 vs 1.8 tests this
weekend.
planning. We are possibly going to run some stock 1.6 vs 1.8 tests this
weekend.
(z)
Lacking UMPH
Just a thought - have you adjusted the timing at some stage. If so it is
possible for it to slip if the bolt is not tightened correctly. Or if
advancing too far your performance will also drop off. If checking the
timing with a timing light remember to connect the GND & TEN terminals on
the diagnostic box first. (located by the airbox)If you do not ground these
terminals the automatic advance /retard will keep adjusting the timing to
where it should be and give you a false reading.
Just an idea.
Make sure the spark plugs are the correct heat range.
Peter.
possible for it to slip if the bolt is not tightened correctly. Or if
advancing too far your performance will also drop off. If checking the
timing with a timing light remember to connect the GND & TEN terminals on
the diagnostic box first. (located by the airbox)If you do not ground these
terminals the automatic advance /retard will keep adjusting the timing to
where it should be and give you a false reading.
Just an idea.
Make sure the spark plugs are the correct heat range.
Peter.
Lacking UMPH
If you want your timing checked I could have a quick look at no cost, my
workshop is in Waitoki. Ian Cole
At 14:48 06-12-00 +1300, you wrote:
[...]
workshop is in Waitoki. Ian Cole
At 14:48 06-12-00 +1300, you wrote:
[...]
Lacking UMPH
Bill,
its more than likely you are used to your car now, a couple of things come to
mind, has the cam belt ever been changed that you know of, i have seen one with
so much slack the tensioner can't take it up and it ended up 2 teeth out on
the exhaust cam, same thing, big loss of performance, also the fuel filter,
the one that sits under the plastic cover in the rear subframe (drivers side)
may need changing, but that doesn't account for high fuel usage,(lead foot eh!)
i would check the valve timing, along with all the usual checks mentioned, some
you've already done
Good luck
Ray
its more than likely you are used to your car now, a couple of things come to
mind, has the cam belt ever been changed that you know of, i have seen one with
so much slack the tensioner can't take it up and it ended up 2 teeth out on
the exhaust cam, same thing, big loss of performance, also the fuel filter,
the one that sits under the plastic cover in the rear subframe (drivers side)
may need changing, but that doesn't account for high fuel usage,(lead foot eh!)
i would check the valve timing, along with all the usual checks mentioned, some
you've already done
Good luck
Ray
Lacking UMPH
Agree on the cam belt .. I have a 94 Mx & hit 100K recently and routinely had
the belt replaced as part of the 100k service ... imagined or otherwise the car
felt much brisker than it had been. Others have indicated improved "feel" after
changing the cam belt at around the 90k to 100k mark.
Regards
Phill Turner
MX 5 Club Victoria Aus
the belt replaced as part of the 100k service ... imagined or otherwise the car
felt much brisker than it had been. Others have indicated improved "feel" after
changing the cam belt at around the 90k to 100k mark.
Regards
Phill Turner
MX 5 Club Victoria Aus
Who is online
Users browsing this forum: No registered users and 2 guests