(first time i have been able to get on i didnt get an email or anything about a name change and havnt been able to log in) now its good though so sweet


i was in my car driving over a pretty good size bridge downshifted into 2nd because i was going around 25-30 mph then once the rpms got to 4-5000 it stoped... engine wouldnt rev any higher.....it has been doing this since that day every time i drive it any gear the peak is around 4 or 5...if i start to feather the gas and then nail it to the floor it then revs up...its not bogging like a clogged filter i just changed it......

sounds as though the engine is being starved of gas but just at a peak rpm....could i be losing compresion?

 

stupid question but you have vac or mechanical secondaries?

 

im not sure but i just read it and ment to say that maybe there was somthing wrong with my secondaries

 

yea, if you have vac secondaries theres a chance they couldn't be opening correctly. I.E. the little vacuum pod might be messed up or it could be something as simple as throttle shaft that just needs some lovin. If you have mechanical secondaries then well I don't have any advice. definately sounds like carb issue if you can feather the gas and floor it and all is well.

Ron

 

what are some things i can look at like the throttle shaft.....what to look for and where is it...still a noob i gusse

 

just try to be sure it moves freely and isn't binding up on anything. check the linkages too while your at it. as far as checking the vacuum pod. I'm not really sure how test that with carb still on the car. I don't think revving it at idle is enough to make the secs open. one thing I guess I shoulda asked, does it rev fine while in neutral or is this an all the time problem?

Ron

 

check the shutter valve in the manifold

 

Could be a couple of things. I'd check the flow on your fuel pump. If it's struggling to keep up with the float bowls, they could empty under heavy load. Also, make sure that your plugs are not fouled. It could also be your accelerator pump. Perhaps the rubber diaphram ripped and you're no longer getting a proper shot of gas when you hit the pedal. That would make the car bog under heavy accelleration as well.

That's all I can think of right now.

Good luck.

 

I agree.Check the primary barrels of the carb for even liquid streams from both accelerator pump nozzels.Do it with the engine off so you can run through the entire throttle stroke.Check your float levels to be sure theres enough gas in the bowls.Also,itd be a good idea to check the inlet filters on the carb.They can get clogged if the primary filter is damaged.
Also,many times fuel starvation is not the filter's fault,but the inadequate,old fuel pump.Once the filters are known to be good,you should definately do a volume test on the pump's ouput.They suck....on top of being 20 years old.

 

To eliminate the possibility of the vacuum secondaries being the problem, convert them to mechanical. If the problem dissapears, that's your reason why right there.

 

Are you sure that its not the fuel filter? Maybe when you "feather" the throttle, you're just giving the fuel filter time to catch up...

 

Even without secondaries, the car will rev right up to redline. Just a whole lot slower, that's all. So I wouldn't think that a secondaries problem would cause the symptoms he described.

 

I agree with moses. When I first got my car the secondaries were jammed closed. I didnt even realize it until I converted to mechanical and forced them to open. Not sure if that was a good thing to do or not now that I think about it. Oh well.

 

Well when I had a temp carb with stuck secondaries, the car would not go past 5k rpm, under load that is. If parked, sure, I could accelerate right up to redline. Once converted to mech, problem was solved.

 

well when reving yes fine but when it gets in these moods i pushed the clutch in and it still could rev any higher........it only does this 2 days a week once or twice a day not all teh time.....

 

Ok so, when idling, is the gas level about halfway on the bowls? if so, try to make the car fail under load and as soon as it happens put the ignition key in the off position to avoid the fuel pump from continuing to operate. Stop, open the hood and look at the bowls. What is the fuel level in each one?

Edit: careful when switching the key to the off position, don't remove it or you might lock your steering wheel while still in motion.

And the brakes might get harder to actuate, be aware of that.