85 Chevy Suburban?

Question

85 Chevy Suburban 6.2 Diesel

Got a problem i was looking for some insight on. When i got to start it in the morning, its hard to start, I let the glow plugs cycle through 4 long cylces before i try to turn it over to get the cylinder as warm as i can, but its still a pain to start, always get a time or 2 it starts up but dies, I always get it started, but when i do, it always starts with a high idle, like its gonna run high for a second then idle down, but it doesnt idle down, sometimes gets faster, if i shut it off, it starts right back up and idles fine. Any thoughts on what might cause this?

The other thing is...how much will timing effect my fuel economy?

Answer 1

look fora fuel leakcheckall the lines and injectors any leak will let air in andwllcausethis i is a good idea to gheck the glow plugs also the colant sensor glow plug controler as well get out the test light and test the plugs
and make sure they are getting power and that they work

Answer 2

1. Check the glow plugs using a test light

2. Place the ground clip on the positive battery terminal

3. Remove all leads from the glow plugs

4. Touch the end of the glow plugs with the test light. If the light comes on then the plug is working.

The high idle is meant to do that. Coolant sensor sends signal, until engine is at operating temperature, to the injector pump. If the engine appears to change RPM, then screw in the end of the fast idle solenoid.
_ _ _

Answer 3

to boot to what others have stated... finding on if it truly is a 2 or 4 wd, reducing it is going to help. If it truly is a four wheelcontinual, that's a good bigger undertaking. you additionally can exchange all the fluids to guy made. The kit lube, bearing grease, engine oil, transmission fluid, etc. Lighten it. get rid of each and every thing in there that's pointless, which includes any seats you do no longer use. carry purely the bare necessities with you. track up the engine. New plugs and wires (if the wires like it). you do no longer ought to apply the maximum up-to-date 'gimmick' the two. ordinary copper tip plugs are nonetheless the greater effective, ordinary, whilst new. they only placed on out swifter than the greater modern platinum, iridium, etc. Dial in the carb and ignition timing for optimal performance. The production unit settings are set for minimum emissions, which does no longer continuously equate to optimal performance. 14.7:a million is the stoichiometric ratio at sea point. you're able to be able to ought to alter the metering rods (Quadrajet) or jets (Holley) to catch up on the air density by altitude on your section. honestly, a greater physically powerful ratio, as much as sixteen:a million is the greater effective, and could be conceivable at cruising speeds on the line, yet that's harder to do with a carb. that's between the reward of gas injection. i'm assuming it has a small block in it. exchange the thermostat to a minimum of one around a hundred and seventy* to one hundred eighty* F. it rather is the temp that small blocks are the greater effective. Engines are air pumps. ordinary in/ ordinary out makes for a greater effective engine. chilly air intake (however in case you need to fab one up with dryer duct) and unfastened flowing exhaust do wonders for mileage. Headers (a million-a million/2" primaries for a inventory engine), unfastened flowing catalytic converter (if required on your section) and mandrel bent pipes into low limit mufflers (Dynomax bullets) will help truly lots.

Answer 4

It probably won't affect things once you're warmed up. If those are 85 glow plugs, they probably don't do much anymore. Time for new ones.

Answer 5

I have seen one of these do this and it ended up being the injector pump. This is expensive and you should exhaust all other possibilities before this attacking the pump.

Answer 6

we installed an after marker chock...under he dash with a pull/push type switch...ive heard these trucks dont much care for cooler temps..press the gass petal for 3 or 4 sec then try?