1990 Nissan Truck not running good at all

KRAZYB_CUSTOMS

MEMBER
1990 NISSAN TRUCK
4 CYL
2WD

I have a 1990 Nissan D21 truck. 2 wheel drive automatic with a 4 cylinder. Truck sometimes starts and dies quickly after. I have already replaced the coil, spark plugs, rotor and cap, drained the fuel and put in new fuel and made sure that the injectors are getting spark. I manually checked the ecu computer and it came out with code 55 which is no malfunction. I have checked and the fuel pump has 35 pounds of pressure and the compression is 115. Any ideas on what else could be causing my problems?

Monday, July 18th, 2011 AT 2:01 AM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

https://www.2carpros.com/articles/car-cranks-but-wont-start

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems
with compression and valves opening and closing at the wrong time/broken or jumped timing
belt/chain.

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Monday, July 18th, 2011 AT 7:59 AM