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1988 305 truck issue

Discussion in 'Mechanic and Repair' started by SLR, Jan 14, 2007.

  1. SLR

    SLR LawnSite Gold Member
    Posts: 3,218

    Ok i went out to start my old truck to move it,the last time i started it was just before winter when it was somewhat warm outside..now after new gas,filter,plugs, it starts for a bit,gets warm(while running crapy)then dies,backfires,long starting times. When it runs i race the engine,let it slow abit(as to not damage trans),put into gear and get 2feet,dies again..i cleaned everthing,changed air filters,sprayed WD-40 around intake area,cleaned EGR,PCV..now i want to take whole intake area apart to inspect.. Any know what should i be looking for?
  2. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,100

    I seen something like tha before. The car ahd been sitting to about 4 months and ran just fine when parked. It did the same things your truck is doing. It was fix by unhooking the battery and letting it set for about 5 minutes and then hooking the battery back up. It ran just fine after that. Something with the computer I guess. It is an easy thing to try even it if does not work in this case. Cars and trucks that are let sit are targets for wire eating rats and the alike. Check for any bad wires.
  3. SLR

    SLR LawnSite Gold Member
    Posts: 3,218

    Thanks!..will do that as a process of elimination!..i went visually through everything under the hood for the stupid rodent in question.

    I seriously hope it is'nt the fuel pump,in the bloody tank thing!it is -26 out at the moment.
  4. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Posts: 3,503

    The choke isnt sticking is it?
  5. SLR

    SLR LawnSite Gold Member
    Posts: 3,218

    It's fuel injected though..i was starting to think an injector is gumed,or something in the throttle body iced.
  6. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Posts: 3,503

    oooops ..........lol diidnt know when they switched over......Ive got an 85 with a carb

  7. The Intimidator

    The Intimidator LawnSite Member
    Posts: 25

    to see if the injectors are plugged up with the truck running and the air filter assembly of you should see the two injectors on top of the tbi unit. Are they putting out a nice spray or are they sort of dribbling gas? You should check this and vary the throttle while watching to see their output.
  8. rockytopp

    rockytopp LawnSite Member
    Posts: 120

    there is an emergency connector to by pass the switch to the fuel pump. It should be on the left side on top of the heater or ac box . that is the left side as you face the radiator. just hook up a hot and ground jumper , and with out the engine running hook into the pig tail. you should be able to hear the fuel pump run. if not then you will have to pull the tank,,, but first make sure the filter and the fuse is good, filter clean,fuse not blown. good luck
  9. lawnpro724

    lawnpro724 LawnSite Silver Member
    Posts: 2,201

    Not sure if the 88 has cap & rotor or electronic but if it has the former check the cap and rotor. It sounds like you have a cracked cap. You also said you changed plugs what about wires if they are cracked or just worn out it will run like crap and die on you. When you put your plugs in you could have broken a wire without knowing it. I would check out the things I mentioned here and would be bet its one of them.
  10. SLR

    SLR LawnSite Gold Member
    Posts: 3,218

    As i recall it did this very thing last winter,i only forgot because when summer came i used it tohaul wood all summer,and it ran superb!..it sure seems related to a cold weather issue.

    It does indeed have a cap/rotor,i'll investigate under there.And there is good spray when observing with filter off.

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