Question about 1988 Jeep Grand Wagoneer

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My 1988 Jeep Wagoneer has PROBLEMS, please HELP!!! lol

I filled the tank to about half full, and noticed the next day on the way to work that it was sitting at just over half full, but I didn't think anything of it because sometimes it's off a bit if I'm on a slope or whatever right, but on the way home from work it said full, and by the time I made it back home, the guage was at past full.The fuel gauge now says it is at full & a half at all times, even when the vehicle is off. My dash lights(the fuel gauge, speedometer and such) no longer come on. So driving at night is difficult, and to make night driving even more annoying, you know that beeping noise that happens if you turn off the vehicle, but you've left your headlights on? Well...... It happens as long as the headlights are on.... like, even when the vehicle is running! There is like, the same sound but only for a slipt second(not quite even a full beep) when I depress the brake. Not everytime, it happens sometimes when I press the brake, there doesn't seem to be any reason why when it does. As for actual 'can't trust it to be taken on the road' problems; While driving, it used to just just of die out for a second and then if I gave it a little gas it would do a sort of loud pop/backfire and keep going fine. When it did that while I was waiting at a red light, I couldn't give it gas in time and it died. I had to switch back to park, start it on the green light, switch to drive and go again every time. lol I recently thought that that problem was basically behind me, but three times now it has done the same basic thing, accept it does not backfire and keep going, or quit completely. It now seems to imobilize me on the road where ever I am(which is why I can't take it out like this), almost as if the transmition is holding it in place, trying to be in a different gear or something. It just stays in one spot, and when I give it gas it like... partial-revs for a seccond, then gets quiet again, then partial-rev, then quiet, and so on. Every time it 'partial-revs', it moves forward a little and tries to go, but as it gets quiet, it settles backward into place, so it never actually moves like at all. Every time so far the problem has gone away after I've shifted it into park and reverse and drive and so on until eventually it goes.... also, when it is doing that and I depress the brake, it usually starts to sound better... which is odd, but I don't think it's ever actually helped, lol. Anyway, that's all I can really think of right now for problems, hope you can help me..... have a great day!

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  • Master
  • 454 Answers

Test the voltage of the electrical system with the truck running.

Posted on Jul 09, 2010

  • p2x3yz Jul 26, 2011

    Check the ground on the sending unit. There is an access panel under the rear seat.

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