Maybe Spencer at http://www.jeepsticker.com/ can help. It looks like the stripes have been removed. '91-92 Pioneers had stripes with that Pioneer text on the rear panel just above the stripes, hard to see in the picture below.
Yes, those holes are where fog lights and probably the push bar attach. The caps just push out, but I have seen some chrome ones that have a nut holding them on. The newer year (??) bumpers only have one hole on each side. I personally like the lights in the outer holes.
Here's the RENIX manual that explains your engine. RENIX was from '87 to '90.
http://www.pirate4x4.com/tech/billavista/PDFs/Jeep_Renix_Fuel_Injection_manual.pdf
All MJs/XJs came with amber side lights, clear are always aftermarket.
There was someone looking for black interior parts in the classifieds wanted section, try to help them out if possible.
I bought a set of injectors from precisionautoinjectors.com and they have blue plastic tips. Are they protective caps that require removal or do I just install as is? I've tried contacting them but they don't reply.
I wish whoever worked on my truck before I got it knew about this, they must have used a 6 or 12 point and rounded the hell out of the upper bell housing bolts.
Thanks for flexible tube source.
I was the picture of safety :nuts: :t-shirt, shorts, sandals in the bed of one MJ under a tarp (had to block the wind), but I did have my mask on :thumbsup:
It's held in by the urethane sealant. You can use aircraft cable to cut around it. Get it through one point then have a helper help you "saw" around the perimeter (one of you inside the other outside), either wrap the cable around a wood dowel or use vice grips as handles.