Help! Unable to rev past 5000

[XfireZ51]

What EXACTLY did you ask Marc to do w your chip?

[QB93Z]

Originally Posted by chriskinzel

According to the FSM, if there is too much, or too little vacuum there should be an error code. No codes. I may, or may not have this switch. I will keep looking for it. I do have a wire connection ( 2 wires with a white connector) that is not hooked up under my plenum. It is towards the front. Not sure where this goes, but I rember unplugging it when removing the secondaries. Problem?

Chris

The two-wire plug is for the Secondary Solenoid that actuated the secondary throttle plates. I don't know if it needs to be connected. Hopefully, some who has removed the secondaries will join in.

Jim

[Pete]

Originally Posted by QB93Z

The two-wire plug is for the Secondary Solenoid that actuated the secondary throttle plates. I don't know if it needs to be connected. Hopefully, some who has removed the secondaries will join in.

Jim

Yes that's the one needs to be connected even if the vacuum lines are off plug needs to be plugged in.
That's the one I mention in an earlier post.
White plug 2 wires under plenum.

Pete

[QB93Z]

Originally Posted by Pete

Yes that's the one needs to be connected even if the vacuum lines are off plug needs to be plugged in.
That's the one I mention in an earlier post.
White plug 2 wires under plenum.

Pete

Good info Pete, I had the plugs confused.

Jim

[XfireZ51]

Originally Posted by Pete

Yes that's the one needs to be connected even if the vacuum lines are off plug needs to be plugged in.
That's the one I mention in an earlier post.
White plug 2 wires under plenum.

Pete

R U sure? The ECM just needs to see a +.7 v signal from the Differential Map Sensor. That's what allows secondaries to open. I don't have that solenoid under the plenum. By changing the calibration, the sensor always puts out the necessary signal.

[Pete]

Originally Posted by XfireZ51

R U sure? The ECM just needs to see a +.7 v signal from the Differential Map Sensor. That's what allows secondaries to open. I don't have that solenoid under the plenum. By changing the calibration, the sensor always puts out the necessary signal.

Dom,at this time I don't know how the chip was programed.
So I would suggest plug in the solenoid under the plenum and the MAP sensor under the ECM.(don't need vacuum)
I mentioned both sensors on an earlier post.

I figure this is easy and free instead of throwing parts at it.

Also if the error code was programed out of the chip it will not show a code.

Pete

[chriskinzel]

Originally Posted by XfireZ51

What EXACTLY did you ask Marc to do w your chip?

I had him do whatever needs to be done to remove the secondaries. He also did the usual stuff with his chips. 1 to 4 skip removed, radiator fans on sooner, full power default. Maybe I can send the PROM back and have him verify the settings. When I talked with him on Friday he seemed kind of stumped too. You guys are the best. Would have a boat anchor without you all!!

Chris

[Pete]

Originally Posted by chriskinzel

I had him do whatever needs to be done to remove the secondaries. He also did the usual stuff with his chips. 1 to 4 skip removed, radiator fans on sooner, full power default. Maybe I can send the PROM back and have him verify the settings. When I talked with him on Friday he seemed kind of stumped too. You guys are the best. Would have a boat anchor without you all!!

Chris

Heck it's the weekend no shipping till Monday just check these little things.

Pete

[XfireZ51]

So it worked fine w Marc's cal changes but then it didn't. correct? You get a code if you don't let off because the ECM doesn't set a code unless the malfunction occurs for longer than 2sec. You're sure you are not getting a Code 64 or 44?
Cam sensor error is a Code 17

Originally Posted by chriskinzel

I have a problem that has me stumped (not hard to do). I am unable to get the car above 5k. When it get close to that rpm it starts missing really badly. If I try to push past it I will get the camshaft sensor error, and the tach bounces from 4500 down to around 2000. This winter I removed the secondaries and installed Marc's chip. It runs great up to about 5000. I installed new fuel injectors last summer and it ran fine with those. I have installed a fuel preassure gauge. I have 42 psi on startup, and 50-51 psi at 5000 rpm. I have put on new Accel coils, new Delco spark plug wires, new spark plugs. Marc send me a spark controller and the problem is still there. I also have installed a new cam shaft sensor, but I only get the code when I don't let off when it starts missing. I have no codes being set.

I need more help from you smart people.

Thanks in advance
Chris

[chriskinzel]

Originally Posted by XfireZ51

So it worked fine w Marc's cal changes but then it didn't. correct? You get a code if you don't let off because the ECM doesn't set a code unless the malfunction occurs for longer than 2sec. You're sure you are not getting a Code 64 or 44?
Cam sensor error is a Code 17

I put Marc's chip in when I pulled the secondaries this winter. When I started driving it this spring it had the miss. I thought that I had bad plugs, or wires, or coils, Maybe plugged fuel filter of bad pumps. I have replaced or confirmed all of those items are working.
The only code I get is a 17 when I stay on it when it starts missing. I have replaced the cam sensor already to rule that problem out.

Chris