I only got this car a few days ago and it seemed fine then. But now Ive noticed when i start up the car after its been sitting over night that it starts up fine but then just wants to die unless I step on the gas slightly and rev it for a bit. But what worries me is when I give it gas while its in drive it has a delay where it actually drops revs for a second THEN picks up. And even when its idling and I step on the gas slightly it drops revs and you can notice the oil pressure going up and down slightly. Also when I rev it in neutral or park and take my foot off the gas the RPMs drop to about 500 and then pick up to about 650-700

WHAT IS THIS? thanks

85 300CD

your idle is set too low, and you need glow plugs. also your oil filter stem needs new o-rings. um... rack damper bolt adjustment? valve lash adjustment?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

This is a diesel-owners forum. HAH! More seriously, did you mention the year and model of the vehicle in question? I do think I might need to get glasses, so....

Jay.

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On the road, currently:
'83 300D (German spec.) 168k mi. - - Wolfgang (tucked snugly away for the winter!)
'87 300D 375k mi. - finally went over to "The Dark Side"
'87 300TD 225k mi.
Cannondale 66cm CAAD5 w/Campy/Jamis Aurora
Hujsak Custom Fixie/Landshark Track Shark Custom/Ahearne Custom 29'er

1.Fuel Filters [install new ones]
2.Startron in the Diesel Tank.

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'84 300SD sold
124.128

I'm guessing it's for the 85CD he is looking for donor panels in the parts section...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

thanks for quick feed back now that you know what engine this might help to
anyone else have any suggestions?

Smart man ^

Autozone sells a Metric O-ring assortment made by Dorman for less than $8.
Dorman 172 piece O-ring Value Pack #799-450
In it are 24 of the 6mmIDx10mmODx2mmW O-rings that you need for the bottom of the Oil Filter Stem.
While the pats places sell 2 of the same sized O-rings for the bottom of the Oil Filter Stem some people use a 7mmX11mmx2mm on the upper one. There is also 24 of those in the Dorman Kit.

As previously stated start by changing the Fuel Filters.

Other things that can cause the issue:

An Air leak in the Fuel Inlet hoses and/or Hand Primer Pump.

(I will let this long thread speak for itself.)
Ruel Pressure Relief Valve/Overflow Valve Thread:
http://www.peachparts.com/shopforum/showthread.php?t=234609

Sloppy Throttle Linkages can cause hesitation.

If your Fuel Supply/Lift Pump is not doing well it will not supply enough out put when needed. I believe that could also cause a hesitation.

In the manual there is a Vacuum test as well as pressure tests for the Fuel Supply/Lift Pump and the Fuel Pressure/Overflow Valve.

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84 300D, 82 Volvo 244Gl Diesel

Mine does the same thing, and it has new bosch GP's.

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1981 300TD 4 speed manual
Euro bumpers, zender valance and skirts, H&R springs, billy HD's, leveled sls, real AMG Pentas 16x8 et11, vdo boost/egt gauges intergrated into ash tray, eurolights, led 3rd brake light

thank you kind sirs.