ok so i've been taking my car out on nice days...nothing big...just up the street.....now the problem....everything up to WOT is fine...but as soon as i hit WOT it bogs down and if i keep it down it will stall, i haven't checked it out yet since it's alwasy like 30* when i get free time or a day off...so i just wanted to see what anyones thought r on this....running rich? vacuum leak?? idunno

 

TTT anybody?

 

ttt

 

40 views and noone???

TTT

 

What is Wot? and does the car need a tuneup? or maybe ur Carb isnt working right, not giving enough gas at higher speeds, maybe an 02 Censor? possibly, im just learning about cars, these are some problems i had with my car to get it to run good,

 

WOT- wide open throttle

well the tune up was a year an a half ago but maybe only 500 miles on it since... everything else seems fine...it runs fine until i hit WOT...i had my GF follow me today to see it black smoke or ANYthing came out of the exhaust when i floored it (maybe running rich) and there was NOTHING... this is making me crazy

 

Well if its not smoking (rich) it must be going lean (one or the other right?)


Check fuel pressure at WOT, it could be dropping. If so its most likely a dieing fuel pump.

 

well since i have a carbed engine i could swap the fuel pump and filter and shouldn't be a big deal...altho how would i check the pressure at WOT....flooring it in park or N it's fine...it's when it's going up the street that it does it.

 

You would have to run a hose back through the hood and through your window so you can read the gauge while you go for a quick rip. WOT in park or neutral does no good, theirs no load on the engine and it uses alot less gas than when its WOT under load.

 

so i should run a T connector after the fuel pump B4 the carb then just run it to my window with a gauge?

 

That would be the easiest method, yes.

As long as its still visible you can just run the line under the wiper and let the gauge rest on the windshield, requires a few feet less of fuel line than running it right into the car!

 

never run fuel into the car....that's a big no no

 

so how would u check the pressure while driving up the road?

 

Like i said in the above post to let it dangle on the windshield. Or just suck it up and route it inside for a minute so you can get a reading without trying to look at the gauge thats bouncing around outside causing an accident

 

if it's coming out from under the hood on the passenger side i can just have a friend hold it outside the window....i wouldn't bring it IN the car

 

Sounds like a secondary problem. If it was fuel delivery, it would run fine and then bog down, not related to throttle position as your description would indicate.

The secondary air valve must be adjusted correctly. Check out the tech article linked from the TGO homepage for info on that if you haven't already. The choke pull-off is part of the equation, so if it has ruptured, similar behavior.

Every once in awhile someone has a problem with the secondary rod cam on the AV. With the engine off, remove the air cleaner and manually open the secondary AV. The hanger should pull the rods up as you do this. If not, there's your problem.

 

i take it u mean those 2 rodsthat r in the center?? if so they DO come up

i did that last summer and my car ran fine

and the choke pull-off diaphram i guess is fine...i started the car...it pulled the 2ndaries shut adn i pulled them open a lil bit and it shut right back up...i'm assuming that's what it's supposed to do?

 

any other ideas?

 

Do something simple first. Change your fuel filter.

I just had a Cummins diesel in the shop the other day with the same complaint. Runs great while driving around but at WOT it had no power. I didn't have the adaptor to check fuel pressure across the filter so I just changed the filter. Made a huge difference in performance and fixed the problem.

 

Geese I weas thinking the TPS was gone ?
----------
geese i thought it sounded like the TPS was going south

 

throttle positioning sensor? do i even have one?? i'm not sure since it's a 4bbl carb....i bought a filter that i'm gona put in this weekend, i hope it helps, but if it doesn't...one less thing on the list and i'm sure it needed done anyway

 

well i swapped the filter...i don't know what a bad one looks like but the one i took out snapped in half with little pressure...idunno if u can tell from the pics but it looks rusty too

EDIT: i won't know til tomorrow if that was it or not...it';s late and my daughter is alseep...i hope that's all it is

 

Ick, what a tiny little filter. I wasn't paying attention and thought this was an EFI car with the filter mounted down on the frame that nobody ever changes.

That filter doesn't look bad. Normally when they're dirty, it's obvious.

As I mentioned above, it's a quick, cheap first step. I guess the next step is checking fuel pressure like mentioned above. A factory block mounted pump normally puts out about 5 PSI. If you can adapt a tee fitting into the line to check pressure, you can do it at an idle. Carbs don't like more than 7 PSI. If you're only getting 2-3 PSI then there's a good chance the pump is going. Another possibility is a worn pump lobe on the camshaft not providing enough lift for the pump.

You can try another factory replacement pump or install an inexpensive electric pump. A Holley red pump is regulated to 7 psi. The Blue pump puts out 15 psi and needs an external regulater. There are lots of other aftermarket regulated pumps that can be used as a replacement for a mechanical pump.