LUVTruck.com

well I got the S10 up and going and driving around, in town not to bad little slow but its a non turbo diesel cant expect to much but on the highway excuse the expressoin but O God is that thing slow fastest it will go is about 55 mabye 60 if your doing down hill with a good tail wind and it smokes like crazy out the tail pipe but if you let off a little bit and are just staying a constant speed its fine no smoke runs great, the enigne is used with an unknown history but was told it was a good running one and looked realy clean inside when I had to change the pan to the S10 pan, but the injector pump didnt work on it so I had to change injector pumps I dont have the tools to set the injector pump timing to the exact specs so I just centered it in the slots on the back of the timing cover. Im thinking that the pump timing is off first off wich way advances the timeing and where and how much would the proper tool to set it cost me or who in central illinois could do it for me
thanks for your help

A dial indicator will run you anywhere from $30 and up. I've never eyeballed my timing, but I'm sure someone here has.

Let me know when you want to adjust it again & I'll send you the directions from the series 11 service manual.

well I got it all timed it was .001 off so I set that, the thing is still slow as dirt
any other ideas as to what might be wrong ? would the rear end ratio have anything to do with it this S-10 came with a 2.0L 4 cylinder gas orgnally and it has tag in the glove box that says "standard" for the rear end ratio, the diesel that the trans and parts came out of was a 4.11 I beleve, but I still would think it would be able to go above 55 with the pedal to the floor

Well they aren't speed demons by any means, but 55 does seem slow.

The smoke under acceleration seems to indicate sufficient fuel pressure. When I turn my pressure down I hardly get any smoke.

At speed, such as it is, does the engine sound like it's revving really high, or is it bogging? Your gears may be too high & your 58HP may not be able to turn them. Have you counted your driveshaft/rear wheel revolutions to get the rear end ratio?

_________________
'82 Luv 4x4 diesel
270k miles
35MPG

1972 XLCH
1974 FJ40
1967 Chevelle
2004 Sienna (OK. That's the wife's)

Check the glovebox codes...it likely has a 3:42 rear end, too high a speed for the diesel. I have a 3:73 in mine, and it's still too high. Low revs for these engines just won't give you power, and the fuel mileage doesn't really improve, as you have your foot in it all the time trying to get it to go.
Mine revs at 2400 at 100km/hr, still too low for any hills on the highway.

_________________
Bona Fide diesel fanatic.
1994 Chev S10 Ext Cab Isuzu Diesel 5spd
Kubota B6100 HST diesel

I got it running much much better the pump timing was off .001 so I set that, then I filled the fuel filter with seafoam a couple times now it will go 75 with the pedal on the floor now it doesnt get there fast but its sure allot better then it was, as for the gear ratio on the rear end the S-10 most of the parts came from had a 4.11 rear end (the current speometer drive gear is for a 4.11 also), Ive been trying to find out (hopefully without pulling the cover) the rear end ratio my current truck has, the glove box tag just says standard its in the high 3's I from spinning the drive shaft but no one can seem to tell me what ratio exactly standard for an 85 S-10 with a 2.0 gas is not even GM I would like to konw what it has in it, the speedometer isnt even close to right when it says 60 your going around 70ish and GM also cant tell me what color gear I need without knowing the ratio so if anyone has any hints on that I would apreciate it

dewhite--

You can accurately determine your ratio by jacking up one wheel and turning it and then count the driveshaft revolutions. It takes two turns of one wheel to turn the driveshaft the same number of turns as it would go with both wheels turning.

So, two wheel turns (one wheel) would give 4.11 driveshaft turns for a 4.11 ratio.

And, I recommend a stewart warner drive joint adapter to correct your speedo ratio as it is tough to deal with the OEM gears, some of which are inside the tranny. There is one of these on ebay right now. You would need to take it to a speedo shop and get the right gears after measuring your odo error.

Paul

_________________
'84 Isuzu diesel P'up

dewhite, if I remember correctly you said your S10 had the 2.0 engine and auto trans from the factory. It's actually a 1.9 liter, but 2.0 is close enough. The engine is an Isuzu powerplant and this was back when GM was still relying on Isuzu for engines in their manufactured trucks. Then after a few years the 1.9 was dropped and the newer option was the 2.5 liter 4-banger "Iron Duke" engine. (That GM did manufacture of course). Since you had the automatic trans I would say there is a good chance the rear axle ratio is 4.11. This would be a good reason why you can't go 70 mph, let alone 75 mph given the gears are too low. To give you a factory example the Chevy LUV and Isuzu PUP diesel 2WD trucks came with a 3.73 ratio axle when coupled with the 5-speed manual transmission. No other ratio was available with the 5-speed. Another example would be the 83-86 Isuzu PUP diesel with the optional 3-speed automatic, guess what it came with as a factory rear ratio? It was 4.10. Automatic vehicles tend to come with lower ratio axles to make up for the lesser amount of gears they have when compared to a 5-speed that has the five forward gears. The best bet would be to take a trip to junkyards to see if you can get a rear axle out of an S10 that is around the 3.73 ratio range. The 3.73 ratio is much more suitable for highway cruising and keeping the revs down on the good 'ol C223. It should be easy and cheap to find a rear axle for an S10. Just depends on whether you want to do the work of changing it out, which shouldn't be that bad. Good luck and hope the info I've posted is useful to you.

Salvy

_________________
1982 Chevy LUV diesel
2.25" stainless exhaust
w/ MagnaFlow performance muffler

I believe you will find a 3.73 quicker on a 4 cylinder S10, rather than a 4.3l. Not cast in stone, of course, but I found the 3.73 that way. My truck originally came with the 3.42,which was too low (high? Depends on which way you look at it).
With a transmission out of a gasser, and the 3.73 diff, I find the engine is revving too low. At 50mph it's at 2000rpm. I live in hilly terrain, and it's lugging at this speed (in 5th). In 4th, it's revving 2800. When pulling 2300lbs of weight behind you, I find it not the greatest.
Maybe it'll be perfect for what you want, however.

_________________
Bona Fide diesel fanatic.
1994 Chev S10 Ext Cab Isuzu Diesel 5spd
Kubota B6100 HST diesel