myyota85

hey thanks 4 looking i bought 85 yota. its been bored over and has mild cam,demon carb. when it gets 2 about 2 grand it flat out just loses power. from about 2-3 grand. i paid a local mechanic 400 bucks to fix it. he cleaned and put different jets in it. now it falls out at 2-2,400 better but not fixed yet? he says he cant fix it n e more he had it for 2 months.so the problem is that it loses power at 2, threw 2,400 rpm if i hold it between them i can litterally kill the truck. im no carb guy so please help if u no this problem or have had this problem please chime in. thanks all

Firefightertaco

do you know how much fuel pressure your getting to your carb? dont know about demon carb, but does it have a sight glass on the fuel bowl? or do you know if it had a adj. float in the fuel bowl?

myyota85

hey thanks i do know it has a sight glass i can take a pic or video tom if that will help u??????????

myyota85

well ive got the pics of it let me know if i can do any thing else!

myyota85

heres another

myyota85

and another

tried4x2signN

How many CFM*** is the carb? 550? 650? 950?

You might wanna try smaller jets, unless you can confirm thats what the mechanic did...

And yeah, Firefighters post makes perfect sense to...

Are you running the stock FP***?

myyota85

the mechanic put jets in i bet there smaller cause before u could smell and see the unburnt fuel come out the tail pipe and now no smell or black suet out the pipe. help me out here how do i know how many cfms? and the fp? (fuel pressure).

windy1

try putting a stock cam back in. i always use weber 32\36 carbs,never had a problem. try another distributer. the demon carb, and hot cam,should be trashed. get a weber 32\36,and a stock cam.try a recurved distributer,fron l.c. engineering. these trucks,are designed pretty well,as they are,except for carbs. i have an 84,stock cam/weber/recurved dis. no problem. u,inherited someones problem. sorry . mdoyleufo@gmail.com

tried4x2signN

fp = Fuel Pump...

How could you put a Demon carb on your truck and not know what CFM it is?

I have a feeling you're over fueling... And under supplying...

Call up a Demon supplier and find out what the fuel pressure requirements are for that carb...

And now that you talk about smelling unburned fuel you make me think of a coil...

You can't just slap carbs on engines... There's a bit more to it than that...

You prolly need a high output fuel pump. At the very least...

tried4x2signN

Most Demon carbs I know of are insane CFM carbs for insane cubic inch V8 drag motors...

Please explain to me how you even got the thing on. Did you use a Demon to Holley to Toyota intake adapter?

myyota85

i bought the truck with it so cant really answer those questions looks like its on there really good thoe, i wouldnt see why the cam is affecting any thing it just seems as if at 2,200 rpm it dosent get fuel some how. sorry windy but i dont have any of the oem parts and i dont have the $ to buy a cam, is it the jets?

Firefightertaco

Yeah you need to go ahead and get the model number of the carb an see what the cfm is on it, but if you start it up can you immediately rev it over 2500rpm or does it always die out at the same point every time at 2500rpm?

tried4x2signN

Demon carburetor for sale!!!

I'd sell it and go get me a stock 22R carb, or with the proceeds from the Demon get a Weber...

The closer you stay to stock, the less problems you'll ever have


PS, Does it have a 20R head on it?

tried4x2signN

oh, and you're gas washing the cyliders... get ready for a re-ring... sorry...

myyota85

i can get past the 2500 mark it just takes a quick peddle but in traffic yea i get the horn a lot. ill have to call demon tom and get some #s for u.

Firefightertaco

well you could probably figure it out on the internet if you got the model number off the carb, that thing does look really big for the motor, the most that motor should ever need is a 2 barrel carb probably around 300cfms at the most, that 4 barrel you have there is probably pushing around 5 to 600cfm somewhere. What happened to your old carb? Was there anything wrong with it?

myyota85

well i guess i should have said this it is set up for the 2 barrel only the other 2 barrels are not hooked up. well i bought the truck like this it did come with the stock one but lucky me it sold on ebayi guess that was a bad idea now.so does it help that its not actually 4 barrels?

peow130

Wait...
Its a 4 barrel carb with only 2 barrels working?
Lol...

Why don't you just go scour the junkyard for a stock carb, and get that aftermarket pos off your intake.
The aisin carbs are amazing as-is..

Pumpkinyota

Aisin carb from a junkyard, and cap off vacuum. WAAAAAYYYYY too much fuel for that rig. I will be putting up a new thread on de-smogging a carbed 22-R in a few days, that may be a good resource. Also, here's more info:

http://www.bluebassdesign.com/boonin/carb_faq/
http://www.pirate4x4.com/forum/showthread.php?t=249626