I have bought a long block replacement for my 4.0L eng. It is installed in my 91 Jeep wrangler. I was wanting to replace the fuel injectors till I got the price from Jeep. I have had several folks tell me that that cleaning them will do just as well. True or false? It seems to me that I should go on and replace them. Jeep wants about $90.00 each, Advance Auto says they want $60.00 each. Any other options? Would cleaning them be as good? I am also wanting to replace several other components like Power Steering pump and Alternator and Radiator. Anybody got any suggestions.