I think I have read other topics on injectors, but a quick couple questions...
1. In the effort to save money, is it OK to replace just the problematic injectors? I've read to do all 8 but we are talking $6.5k in just parts.
Not sure on your $$ amount....they're $360-$375 (depending on qty purchased) for new OE @LDS, not reman. 25mo warranty
Because of the labor involved with the 1st gen Dmax, it was recommended to do all 4 on the side you had opened up.
Later gen, individual worn injector replace is fine. But with high mileage wear, if one is out of spec on return amounts, there's probably more too.
You'd need a return rate test to determine injector health, more than 80ml or how close to that are the others, to decide on full set or not.
2. .....What is the downfall to this?
Meh, leave it to the Bosch pros, with the equip to evaluate, test and tune.
Stuck injector isn't a piston happy event.
......I was a little intimidated after hearing my buddy tell me how long it took to replace his LBZ injectors and they had more tools and three guys working on it.
Popping the hood and gazing over the cluster**** of it all, it's intimidating.
However, removing the inner fender liners and either lifting to open up the wheel well more, or removing the tire....leaves a BIG gaping whole on each side that reaches almost everything easily for a variety of repairs.
Pick up a pair of push-pin pliers, under $10.
Here's a decent video of it all (disregard his "passenger side / Driver's side" dyslexia).
@ 5:10 you can see the return line for the 4 injectors on the pass side....where you'd remove each clip on one and attach a line to measure return. 80ml or less is good.
"....I just have a firm belief, you take enough bolts apart, something's going to fall off...."
I like that ^^.
2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"