ok here we go again, 97 nissan pickup . changed the fuel pump, ran now its doing the same thing. its not missing. will start after sitting awhile run then die. need to know where to go next?

check the fuel pump pressure (usually there is a schrader valve on the fuel rail, where you can check the pressure). Eventhough fuel pump runs, doesn't mean it produces the correct pressure.

also check the timing (camshaft to crankshaft). set the number one cylinder on TDC of the compression stroke, remove the camshaft timing cover and check to see if the timing mark lines up properly.

hotvtx,

Your statement is below.

it will start then die. any salutions?

Don't really know what a salution is, but the next time it won't start, tell us for sure what is not reachin the the plugs. Spark fuel or both? Again you gotta be 100% sure.

Also is there adequate and proper compression in all cylinders?

Also is there an excessive back pressure problem?

Also could the engine have jumped time?

Also could there be a serious vacuum leak?

Hotvtx,

This link may help. Register at autozone.com

http://www.autozone.com/autozone/repairinfo/specifications/specificationsMain.jsp?childCatName=Fuel+System+Pressure&childCatId=24900289&categoryNValue=24999999&categoryNameForTitle=Fuel+Delivery&categoryName=FUEL+DELIVERY&childCategoryNameForTitle=Fuel+System+Pressure

As a general rule on this vehicle 30-44 psi depending on conditions.

Let us know what you find. Thanks

Hotvtx,

Your statement appears below.

its not missing, it starts sounds good.

So at this point what exactly is the problem? Your above statement contradicts your original posting. Go back and take a look at your original posting, and you'll see you state it won't start. Is it starting or not? You gotta clear up this contradiction before we can help you further. Drivability is close enough :-). Actual fuel pressure is 32-45 psi.

You might be able to rent a fuel pressure guage from autozone or similar autoparts store.