Do it or don't? Cp4=scary

[Chevy1925]

Isn't the failure much worse on the rest of the fuel system though w/ a cp4? Ultimately more expensive as it seems you end up replacing pretty much everything?

Nope. When a cp3 fails, it can send just as much crap through the fuel rails/injectors as the cp4

Tuning for fuel economy is always the wrong reason to tune. Most of the time you will be disappointed from expectations that don't occur.


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I disagree but there are variables that the customer has to understand

 

[798pipelinerr]

Did mine at 5k. Was getting 7.7 in town, now 12.5 to 14.6 in town. Add a lift pump and roll with it, Bosch fixed the metering valve coating issues on the cp4.3 in 2014...

How many miles do you have now?

 

[NC-smokinlmm]

How many miles do you have now?

About 51k. No problems at all...