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Cmp


troymn

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Hello. I have a 1997 2.3 xlt. Does the CMP do anything after start up? Thanks!
 


Mark_88

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Hi, sorry, not sure what a cmp is...are you referring to the computer?
 

RonD

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CMP should mean CaM Position sensor

Yes, it is used to fine tune sequential fuel injector timing and spark advance/retard
But it is not "required" for engine to run on most engines

Early fuel injection engines used Batch Fire injection, one step up from a carburetor.
Sequential injection could be done with a Crank shaft sensor, but was more accurate with Cam sensor, a distributor IS a Cam Sensor, same/same.
Cam sensor will give better MPG and lower emissions.

Crank(CKP) sensor is still the main sensor, engine will not start/run without CKP signal pulses.
CMP fine tunes CKP pulses for best MPG
 
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troymn

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Thanks Again!
 

troymn

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I thought it just read the cam during start up so this is very good to know!
 

troymn

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Can I replace it without pulling off the timing belt cover? I got the bolt out but it doesn't seem to wanna come loose. Did not pry super hard cause I was on my break at work and didn't want to get stranded there longer then I had to.
 
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