Professional Injector cleaning at a dealer

[wolfox]

3M also makes a kit with adaptors of all sorts in them to hook up a can of Injector cleaner to your fuel rail(s). Essentially, something like this would plug into the schrader valve after you did something to block flow to and from the tank. (A set of caps screwed into the nut kit lines yould do the trick, and then you yank the fuel pump relay). You then start the engine and let it run at idle on the can until it stalls. Takes about 15 minutes or so, and then you're done. Remove the caps and shrader valve adaptor, reconnect your lines and replace the relay. It's costly, compared to just maintaining performance with a dose of Techron - but it's like getting a whole new vehicle for certain. I remember reading up on the 3M kit, and haven't tried it myself - but then my CPI is stock new - but the high pressure can and the bullet-proof cleaner in the can is top notch for getting randomly missfiring injectors cleared. Like Techron, it can only clean what it touches so this would not be good on an engine with completely plugged up injectors.

[blazee]

You'll have to do more than yank the relay to keep the pump from coming on. These vehicles use the oil pressure switch as a redundant power source to power the pump. When the oil pressure reaches about 4 psi, the oil pressure switch bypasses the relay and sends power straight to the pump.

[blazee]

I've gotten the TSB mentioned above hosted, since this thread was posted. If any one wants it..... here it is (dial up users expect a delay, it's 834kb):
http://www.myfilehut.com/userfiles/1...20TO%20MFI.pdf

[wolfox]

You are correct Blazee. I just dug out my shop manual on my truck and there is that "safety loop" that ties the engine oil pressure to the fuel pump. You cannot just yank the ECM/BATT fuse out either, because it kills the "brain" of the truck. However, to do this themselves, one could remove the Fuel Pump relay and the connector at the Oil pressure sender to disable the fuel pump if they undertake an injection cleaning with a DIY kit. Good call Blazee....you made me dig out my books and think too. Bastard.

[DINO55]

Originally Posted by wolfox

You are correct Blazee. I just dug out my shop manual on my truck and there is that "safety loop" that ties the engine oil pressure to the fuel pump. You cannot just yank the ECM/BATT fuse out either, because it kills the "brain" of the truck. However, to do this themselves, one could remove the Fuel Pump relay and the connector at the Oil pressure sender to disable the fuel pump if they undertake an injection cleaning with a DIY kit. Good call Blazee....you made me dig out my books and think too. Bastard.

You da man Blazee.........

[blazee]

Originally Posted by DINO55

You da man Blazee.........

Only on Tuesdays. The rest of the week belongs to this guy. (Well...... he thinks so) :
http://media.putfile.com/youdaman

[57Chev]

chevron techtron is wat the dealer told us to get. wallmart, farm and barn