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Car won’t go past 6k RPM

Yianni33
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GTSBoy Grand Master

GTSBoy

Posted
Posted

What voltage is the AFM getting to at that point?

What does the CRO say about the signal coming off the CAS?

What does the wideband say about the mixtures?

Have you tested for boost leaks?

Is the knock sensor going nuts?

Why are your coils in place but the cam covers not?

GTSBoy Grand Master

GTSBoy

Posted
Posted

A CRO is a Cathode Ray Oscilloscope, which is commonly used to diagnose signal problems with CASs. Of course it doesn't have to be an old school CRO these days. You can buy USB cheapies that plug into a computer or phone.

And how do you know that the AFM is good? I asked what its voltage was at the trouble point. We need to know if it is saturating at 5V or something equally horrible.

You don't have a wideband. You would need to install one up the tailpipe and check the mixtures at the problem point.

These are all diagnostic approaches that you need to follow to track down a mystery problem.

MoMnDadGTR Mentor

MoMnDadGTR

Posted
Posted
2 hours ago, robbo_rb180 said:

has the CAS got the washers between it and the bracket?
Is the dwell setting correct for coils?

image.jpeg.23862a2c6ea289fb338a5eaf91b7e620.jpeg

ya I don't see the washer/gasket behind the cas this will cause issues. also I changed my coilpacks and plugs still had a misfire and wouldn't rev up same as you. ended up being the harness itself to the coilpacks.  looks like you have upgraded coilpacks, what ecu are you running? as gtsboy stated you need to check your maf voltage before you do anything mate. start with the easy stuff you cant just assume your maf is good. get your hands on another one and try that if you dont want to test it. this is where I would be starting.

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