LUVTruck.com

32/36DGEV Weber 2barrel downdraft. SOME POPPING AND HESITATION. Timing, Distributer, wires, plugs "fire" good. Carb tight, no vaccuum leaks. Trying to get 100% in mixture/idle adjustment. Floater checked, seems to have correct gas in all ports/jets. 2 vaccuum lines for distributor/advanced are plugged but came that way in box. Question... Should these be unplugged??? Question... Propper adjustment on accelorator pump lever... is it needed for responce on throddle lever??? Accelorated hesitation is there. Seems to diesel as well = should be having enough fuel.

Do you have a vacuum line from the distributor to the intake manifold hooked up? Without it, you've only got mechanical spark advance.

Vaccuum to distributer coming off back of carb. 2 other lines are tapped/plugged. Did see some burns on the spark plug, may be fouled. getting 10mm wires and platinum plugs. fuel burning with 12v accell coil with pertronix magneto electronic ignition module.

well the popping dieseling and hesitation tells me your running rich. Lean the carb out untill it almost dies. Then richen it up untill it just smooths out, then adjust up the idle (mine idles best at 1000rpm with no accesories on). Repeat this process about 3 times. Then check you timing, i have found these trucks especially running hotter spark like yours is (electronic ign.) run best at about 8*-12*. I run mine at about 16* becouse of the other stuff i have, point is dont be afraid to just try stuff like running more advance on the timing and such. Also Webers can be vary hard to trouble shoot unless youve been around em for a wile. Your problem seems like its running too rich but they will give these same simptoms if they are running too lean. So if tuning stuff dosnt fix it look into fuel flow issues. The most common one on these trucks being fuel filters. Good luck and let us know what you find!

_________________
1980 LUV 4x4, going under re-construction...

try this http://www.webercarburetors.com/ppw/htm ... _best_.htm

_________________
My old but now gone Luv...

yeah there ya go...

_________________
1980 LUV 4x4, going under re-construction...

Well. I started from point one. brought it down to the spark. corrected idle, advance and still back firing. Then I started to look for vaccuum leaks again. Well there is a leak. A nice chip in the adapter plate right at the spacer/screw placement. Should be able to fix with good ol' jb weld. Hopefully this does the trick. Weld is going to be curing all day to make sure it is solid for repair. Thankyou all for your helpfull hints. I will keep using them if sealing does not do the trick.

No vacuum leaks now. Started fine then started to do a up down thing. It idled high then low to almost dead then idle up again. Adjusted idle and mixture to specs and runs fine. Thinking problem at fuel level inside carb at floater. barely flowing over primary jet intake. it may be sucking in and losing fuel to minimal level required. When it fills back up it idles then drops again with fuel loss. i dont know what adjustement to use to get the fuel at higher level. I did adjust the floater at microns of an inch due to space limitations. Carb needs more fuel

_________________
1974 stock engine
New: Accell Coil/Accell Plugs/Platinum Wires/Pertronix Pointless System/Fuel Pump/Weber 2Barrel Downdraft/ES3000 Explorer Pro Comp

this has a little more info on the float
http://www.webercarburetors.com/ppw/doc ... -36dfv.doc
if for some reason it does not load go here
http://www.webercarburetors.com/ppw/htm ... akdown.htm

_________________
My old but now gone Luv...

I actually referenced that earlier. Floater adjusted and fuel level is correct. Yet ran into some specifics while reading the Haynes book. Fuel pressure on the Series 4,5, and 6 require 4.5psi. The 32/36dgev Weber requires 2.5 to 3psi. Bought a pressure regulator today and will be installing tomarrow. I have to re fabricate the adaptor plate again. Oh another thing, when changing out carbs the hitachi comes with a granite plate, it helps condence heat so the carb does not get so hot. the weber adapter plates are made of aluminum so the carb got really hot and was boiling the gas to insuffinciency= no true gas provided to intake making it feel like there was not enough fuel coming in = I need to cool down the carb. I have to use the old granite plate and rise the carb, I will be looking everywhere to find the exact bolts but longer so that it can screw into the manifold.

_________________
1974 stock engine
New: Accell Coil/Accell Plugs/Platinum Wires/Pertronix Pointless System/Fuel Pump/Weber 2Barrel Downdraft/ES3000 Explorer Pro Comp

thats odd i didnt use mine and had the carb for over a year and it ran great. but who knows that may help

_________________
My old but now gone Luv...

NOTES: 1974 LUV 1.8 ISUZU : HITACHI CARB to 32/36 DGEV WEBER
REMOVE/INSTALL
Save Hitachi, you will have to take parts off it and fabricate weber for use with the accelorator cable
SEQUENCE 1.Heat Sheild 2.gasket 3.granite plate 4.gasket
5.PLATE ONE: torque down w/ 1/4 turn 6.gasket
7.PLATE TWO: torque down w/ 1/4 turn 8.add all thread to
plate (finger tight only!! to much torgue will promise breakage
and cause devistating vaccuum WATCH OUT when torque carb)
9.gasket 10.CARB: if tight fit use caution when tapping
WEBER ADJUSTMENTS
1.Choke may be tight. loosen at electronic choke. side carb
2.Set mixture screw to stop. Set Idle screw to "touch" lever (no pressure)
3.Set mixture screw to 1 1/2 turns. Then turn @ each 1/4 turn till running rich then lean down. Set Idle screw to adjust. My truck runs @ 2 turns (mixture) and 1 turn (idle)
4.OPTIONAL: I put a secondary fuel filter right before carb.

PROBLEMS I RAN INTO AND YOU MAY AS WELL
Check timing... Mine is @ 6degrees
Check coil... helps burn fuel. im using accell 40000v. seems to work
Check plugs/wires... I fould mine out and it caused back fires. switched to accell 10mm and plugs are running at .040mm. burns good.
Check vaccuum advance... Webers adv intake is right at throttle but is plugged. unplug and apply hose for advance.
Check vaccuum line under electronic choke. 2 lines one is already plugged and youll need to plug the other. (74 and below only...line used for emissions)
Check power to electronic choke
Check fuel resivoire if level is below primary jet intake then adjust floater.
Spray carb cleaner around plates/egr/vaccuum lines/all around to find vaccuum leaks.
Check FUEL PSI. Weber requires 2.5 to 3 PSI ... Hitachi @ 4.5psi You will need a pressure regulator.

Thats all I got for now. If I run into more trial and error I will repost more info.

_________________
1974 stock engine
New: Accell Coil/Accell Plugs/Platinum Wires/Pertronix Pointless System/Fuel Pump/Weber 2Barrel Downdraft/ES3000 Explorer Pro Comp