I have a gas leak on a 1998 Montero sport from the back of my engine that then runs down the transmission and to the ground any ideas were to look

Picture of location for what ?
First thing to do with any transmission codes is check the fluid and clear the codes after recording them then redo a test drive cycle

A P1750 can be anything from a wiring short or a bad TCM

It could be the converter clutch solenoid, shift control solenoid, pressure control solenoid or engine control module has failed.

If the code comes back then you will have to check the wiring harness to the transmission and test the solenoid pack and see if they are malfunctioning ! Your best bet , take it to a qualified repair shop .

It's the EVAP system. Code is for an open or short to ground in the gas tank vent valve. Pin hole in tank might cause a P0442 for a small EVAP leak, if the hole was large enough.

Follow your shift cable down to the transmission, it will be attached to the end of it. Before that, clear the code and see if it comes back again. Could be just a momentary glitch.

could be from a number of places have the engine thoroughly cleaned and then look for fresh oil drips starting at highest point of engine working way down

If the check engine light is not on, check the fuel pressure and exhaust flow to start with.

A new gas line - $15. The 3 hour labor in a repair shop needed to install it - around $350.

if its an automatic, go through the gears a few times, while its running and you have the E brake on,, you probably have air in the lines, go from Park all the way down to Low, and back,, feeling for the selected gears to pop in place

if its the same as my 97 its under the center of the engine...you have to drop the sump guard and its just by the brake lines that run down the center of the truck...its a pain but not too bad

look for a big vaccum leak on your engine

Hi Avocat

You can download a workshop manual free here.

Good Luck !

Please give me a FixYa rating please !

John



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