Rebuilt 1986 2.9L 4x4 5 speed manual

[Old&Cranky]

No fire, sounds like a ignition system bug. You already eliminated one possibility with the TFI module swap.
I can't remember if that particular setup uses a crank trigger at the front/rear. Would have to dig into some tech manuals. As usual, check all the basics 1st.
If I run across any substantial info on this subject, will check back in.
Not too shabby there. Mighty sano.
Never understood why the Motor Co. let GMC get away with building the Typhoon and never answered back with one of these type units with a 302 under the hood & a suspension package with the label of Hurricane
The neutered corporate shirts of the post '73 government crackdown.
It took the Exploder era to finally get anything similar with a 302.

Thanks.

 

[Old&Cranky]

Today, it was around 45 degrees... as usual truck would not start. Decided to put hair dryer on each part then try to start engine after each item warmed.. thought I had tried everything until I reluctantly figured I'd put it on solenoid... boom, started right up... let it sit about an hour, would not start again. I put hair dryer on solenoid again, started right up. Once again, the engine would not start but would crank with good power until hair dryer, twice. I had never heard of solenoid not allowing engine to start below 50 degrees or cranking an engine without fire... weird I thought, but right next to solenoid (when I found out what it was) is the EGR (Exhaust Gas Recycle) solenoid. Because it is so close to starter solenoid I may have warmed EGR solenoid too! Mechanic said to unhook plug from EGR solenoid. It will start without it. It did start and ran fine without it. If it starts tomorrow morning it is EGR solenoid. If not, it is starter solenoid. Ordered new starter solenoid just in case... go figure. Knew it had to be simple, but was hard to find problem. If it's EGR solenoid, I have EGR blocked anyway, so it will stay unplugged.

 

[L\Bronco]

Today, it was around 45 degrees... as usual truck would not start. Decided to put hair dryer on each part then try to start engine after each item warmed.. thought I had tried everything until I reluctantly figured I'd put it on solenoid... boom, started right up... let it sit about an hour, would not start again. I put hair dryer on solenoid again, started right up. Once again, the engine would not start but would crank with good power until hair dryer, twice. I had never heard of solenoid not allowing engine to start below 50 degrees or cranking an engine without fire... weird I thought, but right next to solenoid (when I found out what it was) is the EGR (Exhaust Gas Recycle) solenoid. Because it is so close to starter solenoid I may have warmed EGR solenoid too! Mechanic said to unhook plug from EGR solenoid. It will start without it. It did start and ran fine without it. If it starts tomorrow morning it is EGR solenoid. If not, it is starter solenoid. Ordered new starter solenoid just in case... go figure. Knew it had to be simple, but was hard to find problem. If it's EGR solenoid, I have EGR blocked anyway, so it will stay unplugged.

Hey cranky:
look at the fuel pump relay and EEC power relay. The fuel pump relay is green and the EEC power relay (Powers up the PCM), is brown. If I remember my 86 B11's, they are very near where you are heating. Either will cause a no start condition.
Try some known good ones if you can.
Hope that helps
Cheers

 

[Old&Cranky]

L/Bronco:
Thanks! after seeing your message, a light bulb went off in my dark head and the logic of your post made total sense. I checked the relays and saw the green and brown connections you were taking about. Today, I am buying the replacement Fuel Pump and EEC relays to replace them from Napa. I will let you know, but you probably already know what the outcome will be after the next night of chilly weather, which is tomorrow night. Thanks for setting me straight and I do pray that you are correct!

 

[Old&Cranky]

Hey cranky:
look at the fuel pump relay and EEC power relay. The fuel pump relay is green and the EEC power relay (Powers up the PCM), is brown. If I remember my 86 B11's, they are very near where you are heating. Either will cause a no start condition.
Try some known good ones if you can.
Hope that helps
Cheers

Hi again L\Bronco:
Just wanted you to know that my truck now starts again in cool/cold weather again thanks to your suggestion. It has been a lesson in frustration over the last few weeks. Looks like it ended up being the fuel pump relay. It was probably going bad because it would not start at 70 degrees in the shade without the hair dryer. It started in 48 degrees no problem this morning. It would not have 2 days ago. For good measure, I took the solenoid off and cleaned it and all of the wiring thoroughly and removed the EGR solenoid completely. I spent around $250.00 on parts that I replaced, but the $41.00 relay was it. I also replaced the $31.00 EEC relay for the heck of it... I appreciate your advice as I am not a mechanic, but do like to fix things myself if I can. It was easy to replace too! You saved me from taking it to a mechanic.... thanks again!! In the future I may be able to help someone else with same problem.