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  1. Tim K

    Idle lowers in gear

    You need to check; Idle Air Control, Throttle Position sensor and Manifold Absolute Pressure sensor. Get yourself a MityVac and a copy of the factory diagnostic manual. Both of these are very useful diagnosing issues on the TBI engines.
  2. Tim K

    ac vacuum lines

    The '87 factory manual does have a diagram and the color codes for the vacuum hoses. How does one get the control unit out of the dash without tearing apart the whole dash? I need to check the vacuum hoses sealing as currently there is no control over the outlets. After removing the 4 screws...
  3. Tim K

    np208 leaking....new seals in order

    It's an easy fix. Drop the drive shaft, clean all the grease & dirt from around the drive shaft flange. Remove the flange nut and pull off the flange. R&R the seal. Put everything back. Note, do not remove the slip yoke from the drive shaft without marking them. The shaft is balanced and will be...
  4. Tim K

    1987 TBI 350 Fuel Pressure

    Final note on this thread. I bought the ALDL cable, downloaded the tunerpro program and quickly figured out that it would require a large learning curve in order to make any use of it. Youtube is your friend. Before shooting myself I decided to try replacing the ECM with a remanufactured one...
  5. Tim K

    1987 TBI 350 Fuel Pressure

    SOLD! What make and model do you recommend?
  6. Tim K

    1987 TBI 350 Fuel Pressure

    I should have been more specific, as of a week ago, the OE TBI is back on the truck. Both of the grounds next to the outlet are clean and tight. New ground strap from the cab to the engine and the battery is tied direct to the alt/engine and the frame. Cranks fine so the engine ground is good...
  7. Tim K

    engine troubleshooting

    Did it run when it was parked? If so, how long ago? Was someone was messing with the distributor or it was parked because it quit running?
  8. Tim K

    1987 TBI 350 Fuel Pressure

    The only code it is throwing is 44. I was also thinking that the MAP may be fooling the ECM into throwing a 44 code. Yesterday, I probed the "B" green wire with the power on and the engine off. It was hard to get a good reading through the plug but I briefly saw 5 volts. So, I assumed it...
  9. Tim K

    1987 TBI 350 Fuel Pressure

    I had replaced the OE throttle body with an Edlebrock (sp) TBI. It didn't make any difference other than make worse milage. My mechanic suggested putting the OE back on it. The engine is bone stock. Ran it again this am. Tried first with the o2 sensor disconnected. I figured it would stay in...
  10. Tim K

    1987 TBI 350 Fuel Pressure

    With it showing 11 psi after the new fuel filter I decided to replace one of the fuel pumps just to confirm the pressure being not the problem. With the tank on the ground and with a new sending unit and pump it produced 17 psi. Close enough to 18 for me. I also lengthened to sending unit...
  11. Tim K

    1987 TBI 350 Fuel Pressure

    Anyone have a link on this 3 wire? How is it incorporated into the wiring to the ECM?
  12. Tim K

    1987 TBI 350 Fuel Pressure

    So you replaced the fuel pump? Did you measure the line pressure before hand? Also, the fuel filter was replaced less than 20k miles ago along with one of the fuel pumps and i don't buy the absolute cheapest crap gas, only branded.
  13. Tim K

    1987 TBI 350 Fuel Pressure

    The truck is throwing a Code 44. The problem is not the O2 sensor or the pig tail. The truck feels very lean, the new Cat looks like it was very hot. It starts and idles great. Throttle tip in and it dies. Both tanks are showing 11 psi, at idle and road test. My GM service manual is...

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