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:banana: :banana: Okay, didn't find anything that addressed my current issue whilst performing a little search, so here goes. My 1992 MJ 4.0, 5-speed with ~80K on it is great to start when cold: it takes like one good revolution of the motor and idles great....problem it is hard to start when at operating temperature....like when I go to start it after 20 minutes at the grocery store. Couple things I thought it was related to that I fixed recently: 1. CPS replaced (slightly improved idle) 2. IAC replaced (no change) 3. New battery (was going bad anyway....slightly improved start...not really though) One thing I keep thinking about is the fuel pressure... I have a gauge at the rail (thanks Hornbro!)...IDLE= 41 PSI, anything greater than idle is 49 PSI. I have larger injectors and the appropriate FPR...the question is this: is there supposed to be fuel pressure just before the engine turns over (key ON)? and just after the engine is shut down...? My situation is that the pressure goes to 0 PSI right after the motor is shut down and when the key is ON and I hear the fuel pump for a second....I heard there was a valve in the fuel pump that could go bad? Any help would be great. Thanks! :cheers:

Never noticed until this winter, heater isn't hot enough. Not really complaining but this winter is rather chilly. My truck's heater get warm it's not broken. It gets hot enough to defrost the windows but not enough to keep the cab warm the entire time. Especially when I'm on the highway it can't heat up the cab enough. Anyone know how to increase the heat coming out. Not just the air flow I mean the temperature.