98 model cranks for about one second

[Mankind]

This has prolly been asked but i cant find anything is the search functions. My brother-in-law has a 98 model that we replaced the engine in. Everything went as it should until we put gas in it and cranked it. It runs strong and smooth for a second or two and then dies as if i turned it off. The fuel pump runs and it has oil pressure. If we feed it fuel through the intake tube it purrs like it should. New filter and pump is 6 months old. Any suggestions?

 

[SunlitComet]

Do you have a factory installed security system that needs to be reset or programmed because the battery was disconnected for so long?

 

[Mankind]

It has one on the truck cause the security light is on. I found a post that instructed how to on a 2000 model. Tried it but the light wont go out like the post said it should. Is there another way?

 

[SunlitComet]

PASSLOCK - Reprogramming Auto Learn IMPORTANT: If a new Vehicle/Powertrain Control Module (VCM/PCM) is being installed for the first the manufacturing enable bit will be set and the auto learn procedure may not be necessary.

The following procedure allows for anyone to reprogram the EVO/PasslockTM module learned data code with any tools, other than the scan tool, when any of the following parts are replaced:

• The EVO/PasslockTM module
• The passlockTM sensor
• The VCM/PCM

The EVO/PasslockTM module will set the DTC B3031 module in the learn mode when entering the reprogramming procedure.

STEPS

IMPORTANT: Erase the passlockTM related Diagnostic Trouble Codes (DTCs) that are stored in the VCM/PCM. If there are any powertrain related DTCs, record these DTCs then refer to A Powertrain On Board Diagnostic (OBD) System Check. See: Powertrain Management\Computers and Control Systems

The following is the Auto Learn Procedure:

1. Insure the ignition key is in the ON position.
2. Clear all EVO/passlockTM module and VCM/PCM DTCs. Record and refer any VCM/PCM DTCs. Refer to A Powertrain On Board Diagnostic (OBD) System Check. See: Powertrain Management\Computers and Control Systems
3. Momentarily rotate the ignition key to the CRANK position (Do NOT start the vehicle), then release it to the RUN position (Do NOT key OFF in the process).
4. Wait 10 minutes . Observe the SECURITY indicator. Refer to the following list for the appropriate responses:

• • If the passlockTM sensor was replaced the SECURITY indicator will flash for the 10 minutes duration.
  • If the EVO/PasslockTM module was replaced, the SECURITY indicator will flash for a few seconds and then remain ON for the remainder of the 10 minutes duration.
  • If the VCM/PCM was replaced with a new programmed VCM/PCM and connected to the vehicle for the first time, the vehicle will start and this procedure may not be necessary.
  • If the replacement VCM/PCM was connected to any vehicle at any other time, even momentarily, the SECURITY indicator will flash for a few seconds and then remain ON for the 10 minutes duration.

1. The SECURITY indicator will transition from flashing to ON briefly to OFF after 10 minutes if remaining in the ignition ON position.
2. Turn the ignition switch to the OFF position and wait for 10 seconds .
3. Repeat steps 3-6 two more times. The new security code is ready to be communicated among the Passlock sensor, EVO/Passlock module and VCM/PCM. The new password is learned on the next ignition lock cylinder cycle from OFF to CRANK to ON (start attempt).

 

[Mankind]

Same procedure we tried earlier. Got the batttery on charge for the night so we will try again after church tomorrow.

Thanks for the info.

 

[branndon_b]

this might be a long shot, or dead wrong, but i think that i've seen somewhere that there is a signal from the oil pressure switch to the fuel pump that tells it to turn off if it doesn't see oil pressure within a certain amount of time. and i'm not sure if that's even the case or not, but seeing how if you feed it fuel and it still runs, it's not an ignition issue or a security issue, in my opinion. and don't always assume that because the fuel pump is new that it's all good either. electrical stuff is funny like that. sorry i'm rambling, i keep looking at your original post and trying to think as to what it could be. but i'd double check fuel rail pressure, and make sure it's sufficient, and make sure that the pump doesn't peter out after start up. could be pump, relay, wiring to the pump, ignition switch, the list goes on. but try and single out all the problems and it'll whittle down your options. keep us posted.

 

[SunlitComet]

You may have to get it to a dealer by tow truck then maybe.

---------- Post added at 11:00 PM ---------- Previous post was at 10:58 PM ----------

this might be a long shot, or dead wrong, but i think that i've seen somewhere that there is a signal from the oil pressure switch to the fuel pump that tells it to turn off if it doesn't see oil pressure within a certain amount of time. and i'm not sure if that's even the case or not, but seeing how if you feed it fuel and it still runs, it's not an ignition issue or a security issue, in my opinion. and don't always assume that because the fuel pump is new that it's all good either. electrical stuff is funny like that. sorry i'm rambling, i keep looking at your original post and trying to think as to what it could be. but i'd double check fuel rail pressure, and make sure it's sufficient, and make sure that the pump doesn't peter out after start up. could be pump, relay, wiring to the pump, ignition switch, the list goes on. but try and single out all the problems and it'll whittle down your options. keep us posted.

They 98-newers no longer have give control of fuel pump to oil pressure switch directly because of the pass-lock system.

 

[Mankind]

Yeah, passlock took place of sensor. Oil pressure is good just by spinning the engine. Problem with resetting passlock is that it tells you not to crank it but it fires as soon as you turn it to crank. I will dc the coil for that i guess.

 

[Mankind]

Went to his house this afternoon. We put the battery in and the security light no longer stayed on. Trucks runs great. Didnt even have to try the relearn.


Thx for input.