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Old 10-17-2009, 08:45 PM   #1 (permalink)
Glen87
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Hard starting Chevette Diesel

I know this is the 6.2 forums but idk who else to ask. Basically the car cranks fine but wont start up when its like 40* out or so. Earlier this year i installed new glow plugs and a manual controller system with a 50A relay and a momentary contact switch. I also installed a new timing belt so i know that the timing is dead on. I havent been experiencing any drivability problems. When i plug it in for about an hour and cycle the glow plugs it pops right off like it was 80* out. Only thing i can think of is that there is a problem with or lack of activation of a timing advance mechanism to assist in cold temp starts. Heres a link to some pics out of my service manual.

http://s777.photobucket.com/albums/yy52/gschilling87/

Any help very apperciated.

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Old 10-17-2009, 10:24 PM   #2 (permalink)
DieselPro
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The timing advance mechanism only affects smoking when the engine is idling and
cold. Has no effect on cold starting. Advances timing to reduce smoke. It's an add on unit. The actual advance is still there.

Suspect glowplugs. Remove all the plugs and test them with a 12 volt hot wire. The plugs should get red hot on the tip. Some will get red in the middle > discard them.

The advance mechanism you have is almost impossible to get any more and if you could get it plan on paying dearly for it.

I have blocked those off, But it does screw up trying to set the timing using the factory method. Other than that I would block it off.

Try finding that info on the net.

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Old 10-17-2009, 10:51 PM   #3 (permalink)
Glen87
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Awesome thanks for the info
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1998 Pontiac Grand Prix GTX 3800sc
1998 VW Jetta TDI 5 speed
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Old 10-17-2009, 11:09 PM   #4 (permalink)
4320Diesel
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that would explain my ahrd start issues! all my glows get hot in the middle not the tip thanks dieselpro!
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your wrong brent, i'll think of a reason later

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brent can't do that, it would look factory, lol

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Brent is right.
Was there any ever doubt?
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Old 10-18-2009, 07:58 PM   #5 (permalink)
acesneights1
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Yeah I gotta test mine. Screw it I'm just gonna replace them. If I go through the trouble to pull em, new ones are going in.
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1986 M1008 CUCV 6.2 J code
GM8 Turbo,DB24911
Raptor 100 lp.
NV4500(the way they should have come)
5 inch Redneckmaster Ex
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Serp Belt conversion. HO WP. Dmax Fan
OD Customs 6.2/5 Diesel and MV Vehicle service
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Old 10-18-2009, 07:59 PM   #6 (permalink)
acesneights1
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I chevette diesel, now there is a rare animal. Chevys answer to the vw rabbit diesel. Wasn't a bad little car other than being gutless but so was the pre turbo rabbits.
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1986 M1008 CUCV 6.2 J code
GM8 Turbo,DB24911
Raptor 100 lp.
NV4500(the way they should have come)
5 inch Redneckmaster Ex
Autometer Fullsweeps
Serp Belt conversion. HO WP. Dmax Fan
OD Customs 6.2/5 Diesel and MV Vehicle service
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Old 10-19-2009, 12:43 AM   #7 (permalink)
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Ya the car is a gutless wonder but it keeps me out of trouble and gets amazing mpgs so far ive gotten a record of 56 miles to the gallon.
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1984 Fiero 3800sc 4spd
1998 Pontiac Grand Prix GTX 3800sc
1998 VW Jetta TDI 5 speed
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Old 10-19-2009, 01:01 AM   #8 (permalink)
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iT'S EASY TO TURN THE FUEL UP ON IT TO.
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Old 10-19-2009, 08:35 AM   #9 (permalink)
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if the motor will not start once you have verified the glows are working right, you might wanna test the compression in the cylinders once you have them all out. if there is a harbor freight nearby, a tester is there for around 30. you can also order one online from their site.
you want compression pressures near 400 and no matter what they are, you want them the same or close on all cylinders. test warm if you can, and if the initial readings are low, squirt a VERY small amount of wd-40 in each cylinder, and retest.
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Old 10-19-2009, 12:40 PM   #10 (permalink)
Glen87
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Thanks for the info on the compression testing . Also how much do I turn up the fuel screw, and where is it located on the pump.

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1988 Chevy K3500 6.2TD nv4500 4.10 gears
1984 Fiero 3800sc 4spd
1998 Pontiac Grand Prix GTX 3800sc
1998 VW Jetta TDI 5 speed
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