Injector Cleaner/Top End Cleaner

wilsondiesel

Member
Nov 11, 2015
190
0
16
Sedalia, MO
Went to buy some GM injector cleaner to run through a truck, AC Delco #x66P 88861803, but they said it was discontinued and here’s the new part #19355198 which just says it’s Top Engine Cleaner. Has anyone just used the top engine cleaner to run through and had the same good results as it’s previous part number?
 

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
21,178
4,967
113
Phoenix Az
from what i gather, it was changed to match Cali crap. in other words, low VOC solevints used and so on. i dont know if id use it but if you have injectors that are border line dieing, you dont have much to loose. worse its going to do is kill the injectors you already have dieing. best its going to do is clean them out and it runs better.
 

J_Stone06

Wasn't me...🥴
Oct 13, 2012
347
3
18
Nowhere, KS
Has anyone found a new version of X66P? Anyone have something else they've had good success with as injector cleaner?

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2004LB7

Well-known member
Dec 15, 2010
6,395
1,755
113
Norcal
I tried E85 with some 2 stroke on my LB7 back when it was having a little injector issues. Worked amazingly well. Smoked white really bad and idled rough but when I was done it was much smoother and seemed to rev up quicker with less smoke

I don't recommend it though but worked for me