The main relay, which supplies power to the fuel pump, can fail. The engine will crank but fail to start (or start intermittently).Google+
Car Problem Reports
Acura Integra "No start" Due to Failed Fuel Pump Relay
Acura Integra Problem
Average Mileage: 171,142 mi (70,000 mi - 260,000 mi)
Visitor, 1991 Acura Integra, 191,000 mi
Car would not start unless you turned the key many many many times until it would randomly crank. Replaced main relay and problem was fixed
Visitor, 1991 Acura Integra, 200,000 mi
car will start normal but some days if its hot out the car wont seem to start,i thought it was the distributor then the cap then the roter but nothing seemed to work till i looked up that if you park on a hill or a hot day the fuel pump dose not send fuel to the engine due to the main relay
Visitor, 1990 Acura Integra, 260,000 mi
Engine would only start intermittently when warm (e.g., after getting gas). Removed fuel pump relay, resoldered the terminals, and reinstalled. Problem solved easily and cheaply.
Visitor, 1991 Acura Integra, 195,000 mi
happens when hot outside. gets hot under dash where located and sometimes starts alright, sometimes starts after waiting a few minutes and towards the end wouldnt start at all in the heat of the day. replaced it and all is well again. fairly easy repair, under steering wheel up under dash.
Visitor, 1993 Acura Integra, 90,000 mi
I have had a new fuel filter, new plugs, wires, battery, and other miscellaneous parts put on to fix this problem. It is still not fixed. I will be looking for a fuel pump relay to see if this solves the issue. The car starts with no problem for long periods of time, then suddenly it turns over but won't fire and I have to shoot starting fluid into it and it will start up almost every time. Once it starts having issues, I do not take it far from home just in case. If I have no issues for a couple of months, I will take it out of town. I have also had this problem in hot weather, but no limited to hot weather.
sinse 145000 when hot (houston tx summer)occaisally the car wont start start after being driven. wait 15 second the car starts,main relay
Visitor, 1990 Acura Integra, 200,000 mi
No start due to main relay. Once it was changed, no problems since
if its hot outside the car will not start.have changed the distributer and the ecu.