1991 Camaro RPM problem - Team Camaro Tech
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post #1 of 6 (permalink) Old May 21st, 09, 01:32 PM Thread Starter
 
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1991 Camaro RPM problem

My 91 Camaro Z28 will not get over 2500 rpm. I have just replaced the intake manifold gasket, new plugs and wires, new cap and rotor, and the TPS sensor works. I even tried taking the catalytic converter off to see if it was plugged, nothing works. When I start up the car it sounds fine, but when I actually start driving it just doesn't want to go into high rpm's.

Please any ideas will be welcomed.
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post #2 of 6 (permalink) Old May 23rd, 09, 07:19 PM
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Re: 1991 Camaro RPM problem

This sounds like ignition (modual)... Can you free rev it up in the rpm's.

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post #3 of 6 (permalink) Old May 23rd, 09, 08:51 PM
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Re: 1991 Camaro RPM problem

I'm not sure if GM even considered this feature in 91, but here goes. Many ECMs have a rev limiter with two settings. One setting is used when the vehicle is not in gear and the other is when it is in gear. Perhaps a gear position signal isn't making it's way back to the ECM.

Dave
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68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #4 of 6 (permalink) Old May 24th, 09, 08:11 AM Thread Starter
 
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Re: 1991 Camaro RPM problem

It doesn't happen all the time, but sometimes when I free rev it will react fine, but other times it will do the same thing as when it is in gear.
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post #5 of 6 (permalink) Old May 26th, 09, 12:24 PM
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Re: 1991 Camaro RPM problem

It is an automatic, right? In that case it is a 700R4 and could possibly be transmission related. Take it to a transmission shop and let them adjust the TV cable. If that doesn't help, then you could have possibly lost the 3-4 gear drum or transmission pump.

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post #6 of 6 (permalink) Old Jun 11th, 09, 06:44 PM Thread Starter
 
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Re: 1991 Camaro RPM problem

We found the problem, it turns out that 2 of my fuel injectors had low resistance and were not working, with those replaced it has more power then it ever had.

P.S. it is a 5-speed manual
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