Hello all,
I have a 1997 Firebird Formula, the last year for the GEN II LT1 5.7L 350. It has reached 151k miles on the clock. Although it has run very well I had to change head gaskets. I noticed the piston crowns are all about equally coated in a relatively thin layer of carbon but I made no effort to clean off while it was apart. While the heads were at a machine shop for pressure testing and a light milling I decided (rather unwisely) to test the fuel injectors and did so with Rubbing Alcohol thinking that would be harmless enough. How seriously wrong I was! Even though I drained all alcohol from the fuel rail after testing and it sat for a couple of weeks little did I know it had corroded the injectors to the point they don't actuate anymore. After I got a no-start upon re-assembly I tested them with no fluid to see if they would click and got nothing from them. Lesson learned. A new set is on order.
I really don't have a need to clean injectors but want to clean up the combustion chambers. I don't expect to get them squeaky clean but any improvement is something. To this end I ordered 6 cans of GumOut Multi-System Tune Up because it contains PEA which is supposedly effective at carbon cleanup.
Can anyone validate the claim of PEA's effectiveness? Is there something on the market that is better? What would be a reasonable application interval of such a additive?
I have a 1997 Firebird Formula, the last year for the GEN II LT1 5.7L 350. It has reached 151k miles on the clock. Although it has run very well I had to change head gaskets. I noticed the piston crowns are all about equally coated in a relatively thin layer of carbon but I made no effort to clean off while it was apart. While the heads were at a machine shop for pressure testing and a light milling I decided (rather unwisely) to test the fuel injectors and did so with Rubbing Alcohol thinking that would be harmless enough. How seriously wrong I was! Even though I drained all alcohol from the fuel rail after testing and it sat for a couple of weeks little did I know it had corroded the injectors to the point they don't actuate anymore. After I got a no-start upon re-assembly I tested them with no fluid to see if they would click and got nothing from them. Lesson learned. A new set is on order.
I really don't have a need to clean injectors but want to clean up the combustion chambers. I don't expect to get them squeaky clean but any improvement is something. To this end I ordered 6 cans of GumOut Multi-System Tune Up because it contains PEA which is supposedly effective at carbon cleanup.
Can anyone validate the claim of PEA's effectiveness? Is there something on the market that is better? What would be a reasonable application interval of such a additive?