My 95 wont rev over about 5400....Help!!
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Hello all,
I just bought a 1995 993 with 79k miles yesterday. The PPI was perfect with the note that the clutch pedal is a bit low and it may need a clutch sometine soon. That isnt a problem since I plan on pitting in a LW flywheel. Anyway, Since I flew to New Jersey to pick it up and I had to drive back about 600 miles I didnt beat on the car at the test drive. I did driive it but didnt go over 5k. And it runs great. So basically, Im driving back yesterday and had to go around a semi and I had to run it up to get around him (Plus I just wanted to have a little fun) and it wouldnt pull over 5k or so. The car just felt lke bad gas or something. The car has been a garage queen for the last 3 years. Anyway, I ran the car down to 1/2 tank and filled it up and it felt like it was getting better (I mean it would rev a bit higher) but not to redline. Sometimes it would get almost to 5800 but thats it. So I ran that tank out until the light was on and filled it up again for the last 100 miles of the trip (Right at Mid Ohio actually![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
and it still wont go to redline. I got home at midnight and I love the car but I just need to figure this out!!! Help! PS, I did do a search. THanks!!! Mark
I just bought a 1995 993 with 79k miles yesterday. The PPI was perfect with the note that the clutch pedal is a bit low and it may need a clutch sometine soon. That isnt a problem since I plan on pitting in a LW flywheel. Anyway, Since I flew to New Jersey to pick it up and I had to drive back about 600 miles I didnt beat on the car at the test drive. I did driive it but didnt go over 5k. And it runs great. So basically, Im driving back yesterday and had to go around a semi and I had to run it up to get around him (Plus I just wanted to have a little fun) and it wouldnt pull over 5k or so. The car just felt lke bad gas or something. The car has been a garage queen for the last 3 years. Anyway, I ran the car down to 1/2 tank and filled it up and it felt like it was getting better (I mean it would rev a bit higher) but not to redline. Sometimes it would get almost to 5800 but thats it. So I ran that tank out until the light was on and filled it up again for the last 100 miles of the trip (Right at Mid Ohio actually
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
and it still wont go to redline. I got home at midnight and I love the car but I just need to figure this out!!! Help! PS, I did do a search. THanks!!! Mark
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I went down to 3rd, I stopped for gas and started out in first to second to 3rd ect. It pulls fairly strong but not like it should. ..
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Very nice-looking car! No specific ideas on a solution except to check and replace ignition components (caps, rotors, plugs, check wires, check your dual distributor drive) and call the shop that did the PPI and ask them WTF.
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It may be the DME has been re-chipped . If that software is not done properly the DME will back off to 6000 rev limit to save the motor .
Might be worth checking that situation out ?
Geoff
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KS400200,the oldest 964 on Rennlist,unless you know differently !
Might be worth checking that situation out ?
Geoff
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KS400200,the oldest 964 on Rennlist,unless you know differently !
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Originally Posted by Red rooster
It may be the DME has been re-chipped . If that software is not done properly the DME will back off to 6000 rev limit to save the motor .
Might be worth checking that situation out ?
Geoff
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KS400200,the oldest 964 on Rennlist,unless you know differently !
Might be worth checking that situation out ?
Geoff
----------------------------------------------------------------
KS400200,the oldest 964 on Rennlist,unless you know differently !
I believe its called a check sum error?
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Originally Posted by Steve Weiner-Rennsport Systems
Make sure the resonance flap vacuum actuator is working,..........you may need to find a shop with the Hammer to perform the diagnostics.
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Originally Posted by CarreraX
I just went out and it will rev to redline in neutral!
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Sorry , I forgot to mention the few minutes delay after start up before 6000rpm limit .
Yes it is checksum error in the DME software . It all became known in 95 !
The resonance flap will not limit the rpm , though it has an effect on measured bhp !
Geoff
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KS400200,the oldest 964 on Rennlist,unless you know differently !
Yes it is checksum error in the DME software . It all became known in 95 !
The resonance flap will not limit the rpm , though it has an effect on measured bhp !
Geoff
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KS400200,the oldest 964 on Rennlist,unless you know differently !