injection Pump ?? Found something odd.

[ocnorb]

My '86 has been solid reliable for the last 1.5 years since I bought it. So aside from regular maintenance it hasn't been fooled with. (By me anyway)

The other morning it did the run for a second then die trick, so i knew from reading on here that its probably a return line leak; the kit has been ordered plus I just steam cleaned the fuel pump area and bought a block off plate to go with my new carrier electric pump I received last week. (Thanks Gen)

Aside from all that I noticed that the throttle did not return all the way- it sits a good 3/8" above the cold idle solenoid rod even when the rod is extended. I must now state that this truck has never had a high (cold) idle- I just assumed it did not work. Now I can see that it couldn't possibly work.

Truck runs great. Will push 12-13 lbs of boost, but I seldom go over 6-7 psi. I am getting good gas mileage.

Can anybody explain this IP throttle being so far out of whack? Can post some pictures if it helps.

 

[itsacrazyasian]

I wonder if your cold advance solenoid bracket is bent. Mine was bent down, bent it back up and you can adjust the solenoid by twisting the hex end to adjust the high idle.

I bent mine back till it contacted then adjusted it up. works great!

 

[icanfixall]

These solenoids are fully adjustable and... The mounting plates can be moved forward or backwards. Just loosen the 7/16 hex bolts and push it towards the firewall. Then a 1/4 inch socket to turn the plunger till you get what you want. The plunger threads are an interferance thread and turns with some diffuculty but it will turn. Also its a very fine thread so plenty of turns to make a big move.

 

[86truckpull]

The truck I recently bought has the same problem I didn't rlly llook at it much I notice the deli lid was working but wasn't coming in contact with it so thanks this helps me out to

 

[motoshop]

Mine would not cold idle either when I first purchased the truck. I checked the solenoid to make sure it was energizing first and then I adjusted my rod out while the solenoid was energized until I had around 900rpm. Works great now. I wouldnt say your IP throttle is out of whack, I'd say the cold idle solenoid needs to be adjusted.

 

[ghunt]

I'm wondering if someone was having problems with rough starting so they just turned the idle way up, so it was like it was on cold advance all the time. It's a possibility.

 

[ocnorb]

I'm wondering if someone was having problems with rough starting so they just turned the idle way up, so it was like it was on cold advance all the time. It's a possibility.

I would suspect that myself, except it seems to idle nicely. Can't remember the RPM off hand, but it is about right.

 

[ocnorb]

I would suspect that myself, except it seems to idle nicely. Can't remember the RPM off hand, but it is about right.

Idles nicely at 500 RPM in gear...

Looked at it tonight while I was putting a block off plate in the fuel pump hole and installing my carrier facet pump. I think crazyasian and icanfixall are right about the bracket needing to be moved. It got dark fast so i didn't quite get that looked after.

The brass fittings for the mechanical pump delete cost $41! at O'reilly's. More than I thought 5 fittings should cost.

I've been having trouble finding my air leaks (my return line kit hasn't shown up yet- tracking number says its still in Michigan somewhere)- it was pretty cool to watch what happened when I put juice to the new electric pump- the return lines that were previously dry began to FOAM and bubble everywhere!! Its hard to believe that the truck didn't give me issues waaaay before now. You know its a good truck when it waits until the subzero temps are gone to give you trouble!!

I almost feel I should video the hoses foaming to show other newbs like me just how much air can be leaking through a seemingly solid piece of fuel line!

Can't wait to fire her up in the morning and see how much better it starts!