Rough idle in gear 1997 ford contour 4 cyl ohv

run fault codes and look for faults in idle sensor---MAF sensor

Here are the most common causes of idle surge, rough idle esp when cold, other symptoms include stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

88 ford ranger 2.9 surges buck down when take off in first gear

First, check for vacuum leaks. Those cars are known for getting leaks in the PCV elbows. Also, have your TPS sensor checked.

Rough idleing, especialy when the air condition is on, is really quite normal for old cars. I drive a 96 corolla and when the airconditioner is turned on, the car will make a deep whining noise. It should stop when shifted into drive(automatic) or gear(manual) in most cases, it is not a serious problem. However, if you feel the idle is too rough, i would recommend fuel additives designed for highmilage cars. I use fuel injector cleaner. after many uses, my rough idle ended. If after trying this, you find the idle to still be to high or rough, have a talk with your local mechanic. Hope this helps

1443= evap control system canister purge malfunction 0125=tps throttle position sensor voltage lower than expected

Did you check the idle air control valve? See tips at the link below.
Do It Yourself Diagnosis and Repair

This is a common complaint on these cars. I own a 96 myself.
Assuming that you engine is fine and runs smoothly under normal operation, and just is rough "feeling" at idle while stopped; then I would suggest changing the motor mounts...the mounts may not be broken, but the rubber isolators get worn and soft, and transffer normal engine vibration into the chasis of the vehicle. Mine was doing the same after changing the mounts good as new again.
Please note...don't use cheap mounts, by the better grade/quality mounts.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

The mechanic should check on the idle .Because the Idle of the truck is adjusting by it self . That causes the truck to stop .check the Idle then lock it up to so that it will not adjust until it will make the truck stop .the main reason why the truck stop and pressure guage going down steadily is that no fuel enters the fuel pump when it adjust Idle by it self . It adjust by closing way or blocking the fuel to pass and go to the engine.then the engine dies .

you could try to clean the mass air flow sensor