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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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I got a severe miss at idle speed. Engine lopes goes away at

Customer Question

I got a severe miss at idle speed. Engine lopes goes away at faster RPMS. Stalls when I come to a sudden stop. Hard to start when cold.
Submitted: 1 year ago.
Category: Ford
Expert:  Mike S. replied 1 year ago.

What engine? Is this a 2wd or 4wd?

Customer: replied 1 year ago.
2wd 2.3
Expert:  Mike S. replied 1 year ago.

97 should be obdii and monitor misfires and set a code for them. Isn't the check engine light coming on or staying on or flashing and if so, have you retrieved the codes yet to figure out which cylinder or cylinders are misfiring?

Customer: replied 1 year ago.
No codes for misfiring had scan done today. Just for coolant temp sensor which have both been change.
Expert:  Mike S. replied 1 year ago.

I am reading "The Misfire Detection Monitor will be enabled only when certain base engine conditions are first satisfied. Input from the ECT, MC-VAF or MAF, CKP sensors, and Misfire Detection sensor on distributor ignition applications is required to enable the monitor."

So, fix the coolant temp sensor fault first then run the engine again until the misfiring occurs, then check the codes again. The ECT must be working in order for the misfire detection monitor to work.

Customer: replied 1 year ago.
Replaced both coolant sensors yet still get no reading on gauge. Any suggestions?
Expert:  Mike S. replied 1 year ago.

Do you remember the actual code?

Customer: replied 1 year ago.
Don't remember the code all I know is my temp gauge not working and I replaced both sensors.
Expert:  Mike S. replied 1 year ago.

check for voltage to the sensor with the key on run.