I swapped out my injectors about a year back, in an attempt to throw parts at a lousy fuel economy issue... plus I figured it couldn't hurt to replace a set of unknowns with known "fresh" parts.
Because I didn't want the week or so downtime of shipping injectors to a proper shop, I picked up a set of the Made in India Bosch rebuilds to make a quick job of it. At that point I'd either not read or chose to ignore the general E-consensus about their quality...
Right from the start I had one sticky injector that would come and go, nailing like hell then settling back in to a reasonably normal state. After a few miles the issue seemed to resolve itself, so "out of sight, out of mind" and away I go. Over the past year or so and 15,000+ miles, I haven't seen any increase in economy, especially not approaching the near 50 mpg I was getting when I first bought the truck, even keeping highway speeds to 65 or less. In addition to that, I'd noticed a phantom fluctuation in idle speed - sometimes it'd idle spot on and smooth, other times it'd drop a hundred or so rpm and rattle my little truck to bits, which never happened before changing the injectors... Timing is dead nuts, compression is good, etc...
Recently I picked up an injector tester for a song and everything finally came together today...
The original set of injectors popped in the range of 105 - 115 bar, most were a little leaky and one or two didn't have great spray patterns. That set now pops at 130 across the board with new nozzles, no leaks and a consistent spray.
3 of the Bosch rebuilds popped at 100 bar, one at 105 bar. One of them "streamed" fuel instead of sprayed and one seemed to vary in it's characteristics with continued testing. Also noted upon removal was one leaky injector that left the heat shield soaked in fuel while the other three were bone dry - that one didn't seem to leak while being tested, either.
With the fresh injectors, the Caddy idles on the spot at 820 rpm and runs noticeably smoother now, plus I'm confident now that my static timing is somewhere close to spec. Next step is to run a full tank through it (after I fix the odometer) and see where I'm at for economy.
Chris
Topic: Bosch rebuilt injectors - my experience (Read 2175 times)
