07 CX7 doesn’t run reliably.

P

Peter79

Greenie N00B Member
Hi Guys

I have a 2007 model that I just can’t get to run reliably. I had 2 injectors die so I replaced all 4. Ran beautifully for a couple of drives and then it hasn’t run great since. Firstly I have issue starting - but if I disconnect the MAF it starts straight away. Got another MAF from a 2nd hand car and it behaves the same. Got an unbranded one, car starts but it splutters, misfires, etc. especially in 2nd gear through to 3rd - so I’m not confident it’s exactly the right one. However once the car is warm if I put old original MAF back in - it runs well/decent.

Threw some other parts at it thinking it’s fuel / air related but no luck.
- brand new HPFP
- brand new MAP
- brand new PCV valve
- brand new fuel distributor pressure valve
- cleaned EGR and pipe.
- new plugs
- new coils

Compression is the same across all 4 cylinders

I’m all out of options trying to get it to run reliably. Any suggestions or help would be super appreciated otherwise it’s off to the wreckers!

Thanks Peter
 
Only use oem maf

Inspect the wiring to the maf. Jiggle it etc while the car is running to see if the behavior changes

I think you have a boost leak though need to pressurize the intake tract and check for leaks
 
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