6.2 diesel help no glow plugs

[IC Smoke]

Ok yeah its not my 24V but my 83 6. 2 chev wont heat the glow plugs once the motor is warm or you plug it in, and NOW I ran it the other day and its cold (not plugged in) the glow plugs still wont come on to start the motor! I put a new relay on the fender, that didnt help! Any suggestions guys? yeah Ive learned my lesson on the 6. 2 6. 5 they are better off as anchors and even then they arnt worth a F***! Id like to get it fixed. . Ive had to do a couple jobs and leave the truck run for 3-4 hrs in fear of it not starting again!



BTW the light doesnt come on and you wont hear the "clunk" of the plug relay



Thanks guys!

 

[csevers]

The generus motors wiring or controler probably took a dump. What I did was to wire in a push button switch to the seloniod on the left front fender so it is MANUAL control. ALL ya have to do is count and crank it is that easy and simple. I burned out 1 set of batterys and 1 starter due to the light coming on but the glow plugs not working right. I am glad I did the manual control no problems since. Starts better than it ever has



Craig

 

[IC Smoke]

how do you hook it up to be manual? and what is the procedure for counting the cranks? just have em on for 5-6 cranks and shut em off?



Thanks!

Ian

 

[24VChev]

There is a temp sender on the passanger cylinder head that sense engine temp. The sender is against the firewall. If you connect the wires together the system should cylce regardless of engine temp. If you have too many dead glow plugs the system will not cycle correctly.



Malcolm

 

[JUeckert]

your 83 should have as mentioned,a thermal controler on back of the drivers side head unplug the wireing harness,somestimes the little pins in the controller that match up to the plug get corroded and cause probs,simple clean them and reinstal plug. however if the controller is bad or you simply want to greatly extend the life of your g plugs,go with a push button setup. steps for push button control are. 1 unplug harness from controller,simply leave it off,it has no other function. 2 the solenoid on the drivers fender has a plug with a pink and a bluish wire going to it ,leave these alone, on the same solenoid there are two lugs on each side,both should have wires goin to them. get two pieces of wire approx 3 ft long {fairly heavy wire} put lugs on them that are capable of going over the studs that are on both sides of the solenoid ,run one wire from each stud to a suitable place inside the trucks cab,connect these two wires to a push button{you will most likely}need smaller lugs on these wires,so you can attach them to a push button . use a button rated for aleast 15 amps. when you push the button you simply close a circuit,and send fire to your glow plugs. 8 to 10 seconds is a rule of thumb on button times,between cranking. sence you have done away with the factory settup,expect the truck to smoke a bit longer upon startup. also chk to make sure you still have good g plugs,sometimes when a controller fails ,it can burn out the plugs. to test the plugs ,simply run a jumper wire from the hot battery post to the tab of the glowplug itself,no spark =bad plug ,weak spark= weak plug,strong = spark good plug... .

 

[csevers]

I count the time that the plugs are "on" as you don't want to have them on for to long. In the summer YES in the summer (sad but true) I glow 5 seconds and when it gets colder than 40 I move it up to 10 seconds and near 0 degress I hold them on almost 15 seconds and then cycle them once the hammer has starts knocking till the smoke clears up some and it sounds like it will/is running on almost all 8 cylinders.



I never unpluged the temp sensor on the engine and the light in the dash comes on with the manual control so you can see that the glow plugs are seeing current. I had already replace all the glow plugs much earlier in this boat anchors life so I knew I had a good set.



This is the best way I have found it has worked every time so far. Make sure it is a monentary push button so you don't leave them on and burn them out.



Craig

 

[IC Smoke]

thanks guys, Im going to tinker with it as soon as it quits snowing, Ive been hoping that the glow plugs would work so I could move it but no such luck yet Ahhh darn 6. 2

 

[JUeckert]

thanks guys, Im going to tinker with it as soon as it quits snowing, Ive been hoping that the glow plugs would work so I could move it but no such luck yet Ahhh darn 6. 2

coleman,not trying to be rude to severs,but the procedure in my post would be wise to follow. if you leave the harness plugged to the controller,yes you will still have power to the orange dash light,hence when you engage your glow plugs,the light will still work as before. only prob is,if the controler ,that you are already suspecting is faulty,starts to act up in a different way,your g plugs can start cycleing on there own,and if not disabled quickly,this can burn every one of your g plugs up. i have had this happen to me. i have owned 6 6. 2 powered vehicles still got 4 of them. they have held up really well under some hard use. if you disconect the harness,and would still like to have a g plug light to view,but cant figure it out,i will be happy to explain the simple procedure for wireing it up!!

 

[Tcolesanti]

This is how you get it started. Pull the air cleaner off. Get a rag. Locate some gasoline. Soak the rag in gasoline, hold over intake opening. Start engine.



I will not be responsible for the internal parts of your 6. 2. BUT, it will start.

 

[IC Smoke]

Tcolesanti- Ive already broken a crank while driving down the road (no load) so I woudlnt be surprised with a light wind that the motor will crack in 2 :-laf



j ueckert- Thanks for the info, If you could please post/pm me a greatly detailed instruction of how to do the procedure. Pictures would also be helpful.



thanks guys!



Ian

 

[dcamilleri]

go with the push button approach. If memory serves me (you can test this easily), with the key in the on position, ground the blue wire on the glow plug relay, this will activate the glow circuit. Get a push button starter switch and install in dash. Attach one end of switch to a good ground(there is a ground bar above the e-brake) and the other end to the blue wire terminal on the glow plug relay. Disconnect the plug in to stock glow controller. Check passenger side rear cylinder head for a two prong switch coming from the two bolt plate(most 6. 2's didn't have this until 84, but some had the switches added to keep the glow plugs from cycling when engine is warm), if yours has the switch, cut the wires and connect them together. Glow plug light will work on dash when the button is pushed. Check the number on your glow plugs, 9g = bad 6 volt plug can burn out easily if glow cycle is too long, 11g better, 10. 5v plug will handle longer glow cycles and tip will not distort if plug burns out, 60g best, dual coil takes a little longer to heat up but have been tested up to 8 hours continual run time without burning out(self regulating). There are also some better dual coil fast heat glow plugs available, try ebay motors and do a search under 6. 2 or 6. 5.

I logged over a million miles on various 6. 2's and 6. 5's and they were good in stock forms but had some problems when hot rodded. Last engine was 300 hp 6. 5 with 18:1 and 20lb boost. It ran good but just didn't have that bottom end torque that my cummins has. Oo. Oo.

 

[JUeckert]

Tcolesanti- Ive already broken a crank while driving down the road (no load) so I woudlnt be surprised with a light wind that the motor will crack in 2 :-laf



j ueckert- Thanks for the info, If you could please post/pm me a greatly detailed instruction of how to do the procedure. Pictures would also be helpful.



thanks guys!



Ian

on the driver side fire wall there should be a black plug with 3 wires runing to it. a big orange wire,a big yellow wire with a black stripe and a small yellow wire with a black stripe. cut and or splice into the big yellow,black striped wire,with another piece of wire {a small piece gauge wire will do fine} {power goes through the plug to the dash light} take the other end of the wire and wire it to the most convient g plug wire,or like i did simply un plug a plug ,run the wire through the hole on the glow plug tab ,then simply slip the original glow plug wire back on its tab,this alone will will hold the rigged wire in place. {smaller the wire the better this works}. . when you have fire goin to the plugs,your dash light will come on. . also a word about the broke crank shaft,it is recomended that after about 6 years or 150 k miles ,that people with 6. 2 engines replace their harmonic balancers,more often if fuel or oil has got on them . the rubber packing in the balancer deteriates after time or wear,although other than tiny cracks it may look ok ,its actually letting the crank vibrate more,if your crank broke in the middle or front,this may be what caused it... .