Hard to Start

If engine cranks but will not start without long cranking, or if engine starts but immediately stalls, check the following:

1. Binding or sticking TPS, or high TPS voltage with throttle closed.
2. High resistance in coolant sensor circuit (see Trouble Code 15).
3. Incorrect fuel pressure or contaminated fuel.
4. Improper EGR operation, leaking, binding or sticking EGR valve.
5. Ignition system malfunction, worn damaged or fouled spark plugs.
6. Defective in-tank fuel pump check valve allowing fuel to drain back to tank after engine is stopped.
7. On V6-173 (2.8L) if engine starts, then dies, open distributor bypass line. If engine starts and runs properly, replace pickup coil.




*** THIS PROCEDURE HAS BEEN UPDATED BY TSB # 88-434-6, dated 1/90

Some 1987-88 S/T pickups may experience a condition where the fuel in the fuel lines drains back into the fuel tank after the vehicle is turned off and not restarted for a period of time, usually overnight. This condition may be caused by a leaking check valve in the in-tank fuel pump. If this intermittent hard start condition cannot be repaired using normal service procedures, a new in tank fuel pump and strainer may be installed.

IMPORTANT: When replacement of the fuel pump is necessary, the manufacturing date of the new fuel pump should be checked before installation. The Julian date of the new pump can be found stamped on the side of the fuel pump housing. Only install fuel pumps with the Julian date of 1218 or greater.

Parts Information

P/N 25115462 FUEL PUMP
P/N 25055461 FILTER/STRAINER with (20 gallon tank)
P/N 25055458 FILTER/STRAINER