Hypoboa

I just purchasec an 92 sc1 with twin over head cam.Their were quite a things wrong with the car,but I have resolved most of the problems.Someone did'nt know how to read propper fuse placement an that has resolve alot of problems,but this one?It has a 5 speed trans,an starts up an runs fine,But if you rev the engine to 4 grand it acts like it has a rev limmiter or govener,does not stall.Have replaced fuel pump,fixing to replace filter,traced vacuum lines?Any help would be appriciated,have heard everything from computer,catalactic[sp?]converter,egr,clutch?Thanks in advance,Eric

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vms150

it does have a rev limiter. there is no problem there.
also SC1 = single cam
SC2 = twin cam

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Brady
'93 SC2 (hydrolocked)
'93 Cherokee (lifted)

Hypoboa

I got to get that book.That way I can learn more.I called saturn an they were the ones that told me their was somthing wrong with my clutch,but I didnt feel that was the issue.I didnt know their was a built in rev limiter.Thanks alot,Your help is appriciated,Eric

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PurdueGuy

Yup - rev limiter at 4k when not in gear. These engines don't handle no-load rev'ing very well, so it's for the best.

And for '92, it would be an SC, not SC2, though it is the same thing as an SC2.

Hypoboa

I am so glad I found this forum an asked these questions.I feel better about all the confusion I was having.Now I just need to get my cooling fan kicking on an off an I will be ready to insure an tag it.I thank all that have taken the time to give me some very helpful knowledge!!!!!!!!!Thank you,Eric

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PurdueGuy

The cooling fan should turn on under 2 conditions:

-temperature gauge reaches or exceeds 3/4 on the temp gauge (this is not really overheating, especially in earlier S-Series it was fairly normal to reach this temperature. As long as nothing boils over, it's probably ok, though if it's an extremely common occurrance, the coolant system may need attention). Fan kicks on & the temp should drop back down fairly quickly.

-AC is turned on. Fan should kick on a second or two after the AC is turned on, assuming that the AC is working.

If the fan is not kicking on, first thing to do will be to determine if the motor is ok, and there is a way to just jumper a couple things & force it to run. If it doesn't, then the motor is bad. Then go from there...

Hypoboa

Thanks,Yes,Fan is running when I jump a wire over too it.I have never let it get as hot as you are referring,The hottest I have let it get is maybe an 1/8 past the half way point.My fuse is good an my relay is good.Thanks again for the help,Eric

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Blue00SL2

Just so ya know

On an S Series with an Auto-matic (Auto-tragic) Tranny anytime you are in P or N and Rev the engine, there is a Rev limiter/Fuel cut off at
4,000 RPM's.

On an S Series with a 5 SPeed Tranny, when you are in N, there is a Rev limiter/Fuel cut off at 4,000 RPM's.

Now if you put a PCM from an Auto into an S Series that has a 5 Speed, that Rev limiter/Fuel cut off will not exist anymore. However, I'm not sure if it is your timing or what, but your car might then have momentary stall anytime you press on the gas pedal.

Case in Point. I gotta '00 SL2 (DOHC - Double Overhead Cam Engine) with lots of Performance Mods (No Turbo, Supercharger or Nitrous), but just about if not all Bolt-on Performance Goodies. The car originally had an Auto-tragic Tranny. I had the Tranny swapped out about 2 months ago for a 5 Speed. So I don't have any Rev lmiter/Fuel cutoff when I'm in N, but anytime I press the gas pedal, I get a momentary stall/slight hesitation.

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I don't look for Street Races, they find Me !

Hypoboa

Thanks to everyone for all of their help.I really appriciate it.The cooling fan isnt coming on period though,even when you turn the air on.Fuses are all good,relays all good,So it looks like I'm buying a haynes manual in the very near future an I will be having some fun tracing down the wiring to find the problem.What fun,lol.But I am happy that I purchaced the car,An am having fun working on it.Ill get some pics up soon.Thanks again,Eric

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The only DUMB question is one not asked!!!!!!