My 1984 nissan 4×4 pickup has got some problems?

When I start my truck in the morning i have to press the gas for it to start. And when it does start it idles too high pretty much all day at about 2000 to 2500 rpms. When i let off the gas and press it again it loses power and hesitates before returning power. When i floor it it hesitates. I just want to know what is going on. I think it is in the carb but not sure. Choke sticking? What can I do?

3 Responses to My 1984 nissan 4×4 pickup has got some problems?

  1. wesso83 July 7, 2010 at 7:52 am #

    A electric choke carburetor requires that you depress the throttle fully one time, to reset the choke mechanism. This is normal. Idling that high "all day", sounds like the choke sticking, like you mentioned in your question. If you know your way around a carb, trace out the choke linkage, and play with it when it is revving high. If you can manually lower the idle via the choke linkage, then youve found youre problem. Could also be a vacuum leak too. Touching the gas, and it hesitates, sounds like the accelerator pump is out. Do some research on how carburetors work, and play with it. If all else, and NO vacuum leaks are found, and you dont have the knowledge to fix it yourself(no offense), and you dont have the cash to take it to a shop, then save up for a reman carb and put it on. You have several options……just hafta decide the best route for yourself. Good luck.

  2. Brad July 7, 2010 at 7:52 am #

    If no luck with the carb, you could try the vacuum system. I had an 83 F-150 that did the same thing and when I replace the booster diaphragm everything was ship shape. Good luck!

  3. CHEV24EVER July 7, 2010 at 7:52 am #

    just a guess but it sounds like a timing issue,if you have replaced something on the motor,like air filter cleaner,pvc or touched,moved something.timing may be out of whack!!