95 Montero LS, been working on this for awhile doing various other things and now that it's all back together, it won't run right. I found another set of injectors in the back of the truck and they are very clearly different than the ones installed on the engine. As far as I can tell by looking them up, the extra set appears to be the correct set of injectors. They have a shiny metal body. The one's on the engine now are plastic, physically smaller and are green in color. I have no history on the truck but whoever worked on it before left clues that they didn't know much and were somewhat careless putting things back together. I wonder if they slapped these in thinking they'd get some sort of power boost but it actually made it run worse.

Any thoughts? Thanks.

You could always look up the injector on one of the on-line parts stores & compare the photo & description with the 2 sets you have.It may be a starting point to see which set is correct.

I did that and it appears that the extra ones are correct but I'm wondering if these other green injectors would cause the problems I'm having with it running not quite right. The problem I'm having with it is I can here a pop sound (I hesitate to say backfire because it isn't but it sounds like it) The sound is coming from the new cat I just installed and it only does it when the engine is warm or hot. Telling me that raw fuel may be being dumped into the exhaust and igniting in the hot cat. I removed the new cat as a precaution because I really did not want to ruin a $200 cat that is brand new. I will probably swap the injectors and while I'm at it reseal the intake and injector o-rings and install new double platinum plugs. The old plugs were standard Champions.

I was just wanting some info on the effects of having wrong injectors in there.