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CPI problems?? 

 

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 Post subject: CPI problems??
Posted: Tue Apr 22, 2008 8:26 pm 
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One of my mates owns a series 2 EA mont CPI, when driving around easy it will accelerate fine, but when you put the boot in to it, it will not accelerate at all, like its got a flat spot.. I have replaced the TPS's and it made no difference..any ideas on were to start looking?
cheers in advance :)

 

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Posted: Tue Apr 22, 2008 11:04 pm 
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cfi is a good starting point,they don't like full throttle as there is only 2 injectors not 6.

convert to mpfi or just drive it normally.

 

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Posted: Wed Apr 23, 2008 7:27 pm 
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not really the answer im looking for :x
its not my car, just fixing for a friend..

 

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Posted: Wed Apr 23, 2008 8:50 pm 
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could be a lot of things.

injectors could be blocked,fuel pump,fuel filter,distributor,spark plugs,leads,motor could be on the way out,head gasket.

start with the easiest first then go on from there.

 

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Posted: Sat Apr 26, 2008 4:34 pm 
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ok all fixed, replaced fuel pump.. good as new.. :)

 

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 Post subject: Re: CPI problems??
Posted: Tue Feb 01, 2011 7:00 pm 
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Sorry to hijack a thread but rather start another Ill ask my question here as its CPI related

I looked at a car today for a friend its a EB1 CPI auto the cars is great apart from it has a miss on CYL 5, they had replaced the dizzy/coil/leads/cap/rotor & ECU and still has a miss could it be possible that they installed a MPFI dizzin into it and due to being a CPI it has a miss?

 

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 Post subject: Re: CPI problems??
Posted: Tue Feb 01, 2011 9:49 pm 
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its possible the dizzys are different or cylinder 5 has worn rings or dodgy valve maybe.
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 Post subject: Re: CPI problems??
Posted: Tue Feb 01, 2011 10:25 pm 
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more then likely a burnt valve or a head gasket issue.

Bargain the price down, buy it, go to the wreckers get an EL head, intake, dizzy and ECU and go to town on it.

 

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 Post subject: Re: CPI problems??
Posted: Tue Feb 01, 2011 10:31 pm 
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EDXR6-Poly wrote:
Sorry to hijack a thread but rather start another Ill ask my question here as its CPI related

I looked at a car today for a friend its a EB1 CPI auto the cars is great apart from it has a miss on CYL 5, they had replaced the dizzy/coil/leads/cap/rotor & ECU and still has a miss could it be possible that they installed a MPFI dizzin into it and due to being a CPI it has a miss?


the dizzy could be the issue, i know the cfi has a different chopper wheel? to the mpfi.
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 Post subject: Re: CPI problems??
Posted: Wed Feb 02, 2011 8:17 pm 
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tickford_6 wrote:
more then likely a burnt valve or a head gasket issue.

Bargain the price down, buy it, go to the wreckers get an EL head, intake, dizzy and ECU and go to town on it.


They only want $100 for it as it is?

A/C is freezing cold no real leaks apatr from the rocker cover gasket at the front but theres no spark on No 5 lead. Swapped leads same thing Ill do a Comp Test tommorow, but pretty sure its not the head as its just had a new head installed less than 12 months ago.

Just dont have a CPI dizzy here to check with a MPFI one to see the difference. (im not going to pull my ED MPFI one out just to check if its the same or different in the EB lol F*#k That....

Anyone got a few pics to show the differences? also is the TFI differerent from CPI to MPFI?

 

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 Post subject: Re: CPI problems??
Posted: Wed Feb 02, 2011 11:45 pm 
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R u sure it's a series II EA does it have a 4spd or 3spd auto. If it has 12D on the TBAR I would be checking the kick down cable on the throttle body for a 3spd auto.

Check also the throttle cable hasn't stretched.......

 

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 Post subject: Re: CPI problems??
Posted: Wed Feb 02, 2011 11:51 pm 
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its a series 1 EB 4 speed auto CPI 3.9L. its definatly a EB1 I have checked the build plate.

 

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 Post subject: Re: CPI problems??
Posted: Thu Feb 03, 2011 11:39 am 
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The only difference in the dizzys is the chopper wheel.

One tooth is shorter on the MPEFI than the CFI to indicate cylinder 1.

But a MPEFI dizzy will work ok in CFI as it fires the injectors every revolution on the rising edge of the tooth regardless.

And a CFI dizzy will work in a MPEFI, but the ECU fires all 6 injectors at once, so it just runs a little rich. Works, but isn't the best solution.
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