Does code 14 (MAP sensor) match the problems Im having?
This is my first Jeep. 97 Cherokee Sport with 150,000 miles. I got it as something to fix up. Wasn’t running when I bought it. It was missing the following parts I put in. But in new fuel pump, fuel filter, alternator, starter, spark plugs-wires-cap-rotor, radiator, thermostat, intake manifold, throttle body, battery and tires. It runs now put having issues. When I start it idles high 2500-3000 for 20 seconds or so then drops down to around 1000, it’s hard to start I have to give it gas while starting, exhaust smells strong, hesitates when I accelerate, sometimes it stalls while idling (but rarely stalls after a couple minutes of running) . BUT when I get to about 40+ mph it runs dam good as long as I don’t accelerate hard! Code 14 shows up (MAP sensor). SO does all that happen when a MAP sensor is bad?? Ive spent a lot of money already so just want to see what’s the issue before I spend more.
OH, sorry forgot one. My catalytic converter is also bad. I bought a new one just haven’t had the time to put it on.
Your Cherokee has OBD-II self diagnostics, you should use it. Download the four digit Pxxxx Check Engine Light trouble codes with a code reading device and either do a Google search or post them here. OBD-II trouble codes are much more specific about the problem and make your troubleshooting easier.
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YES. MAP sensor is one of the primary suspects for eratic idle. And if throws a code for it then it pretty much narrows it down. But it doesn't necessarily means it's bad. First check your vac hose going to the MAP, it may be cracked or simply disconnected.
Yea just check the vac hose, its good. I didn’t even try this before but I just unplugged the MAP and the dam thing started right up.. It ran rich but it started! Plugged it back up and doesn’t start unless I give it gas.. Well new MAP will be in soon. Ill post the results of the new map when I get it.. Thanks
Its weird cause the MAP sensor in there now looks dam new..
Ok installed the new map sensor oday and still having issues... I have to give it alot of gas to start... But it doesnt idle as high now tho and when i get up to about 25mph it drives great.. I guess its something else too.. I think i should look at the TB tomorrow... Maybe i installed it wrong???
The way im going this whole Jeep is gonna be new by time im done and broke!
Could be a bad part, as TJ said, lots of aftermarket junk out there. And your chances of getting one of those... pretty good.
If you don't want to spend the money on a quality OEM part, go to the junkyard, nowadays you're more likely to get a sensor in operating condition there than with aftermarket parts. And for what they cost at the jy, pull two of them from two different Jeeps to double your chances.
Now there is also a procedure to test the MAP if you have a voltmeter.