1995 Ford Escort Poor idle and stalling

Tiny
MOBIMARK
  • MEMBER
  • 1995 FORD ESCORT
Engine Performance problem
1995 Ford Escort 4 cyl Two Wheel Drive Manual 110k miles

Hi. I have a 1.6 16v escort zetec. Poor idling, sometimes sits with revs too high on tickover sometimes hunts and often stalls at junctions. If I remove the connector from the throttle position sensor the engine runs fine (though this is maybe because the removal is being compensated for by the emu?). I have tried replacing the throttle sensor and this makes no difference. I have cleaned the idle control valve. Cleaned the crankcase breather valve, checked to the best of my ability for vacuum leaks in the multitude of vacuum pipes and carefully checked/cleaned the air flow meter. Through research I have come across other potential causes listed below. Can you please tell me if any/which of these are the most likely cause?
1. Exhaust o2 sensor
2. Coolant temperature sensor
3. Road speed sensor
4. Pulse air injection solenoid

Is there anything else you may be able to add to this list.
This appears to be quite a common fault with a lot of possible causes.
Help!
Do you
have the same problem?
Yes
No
Sunday, April 19th, 2009 AT 10:54 AM

7 Replies

Tiny
MERLIN2021
  • EXPERT
With Ford it's usually a bad IAC, even if the check engine light doesnt come on.
Was this
answer
helpful?
Yes
No
Sunday, April 19th, 2009 AT 11:10 AM
Tiny
MOBIMARK
  • MEMBER
Hi. I have cleaned the IAC/Idle control valve. It was quite coked with carbon but clean now and no improvement.
Was this
answer
helpful?
Yes
No
Sunday, April 19th, 2009 AT 11:24 AM
Tiny
MERLIN2021
  • EXPERT
IAC valves usually DO NOT improve with cleaning! Ford recommends replacing if they are badly carboned.
Was this
answer
helpful?
Yes
No
Monday, April 20th, 2009 AT 8:00 AM
Tiny
MOBIMARK
  • MEMBER
I have now replaced iac valve, still no improvement any more suggestions?
Was this
answer
helpful?
Yes
No
Monday, April 20th, 2009 AT 8:32 AM
Tiny
MERLIN2021
  • EXPERT
Have you read the codes yet? You may have a vacuum leak, get a can of spray throttle body cleaner, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!
do this and count the flashes...Count the flashes, a 22 will flash as 2 flashes then a short pause, then 2 flashes, if more than one code is stored, the pause will be longer. The codes will display three times and end with 11 or 111. Write them down and post here. First do this with the ke on engine off, then again with it running.


http://www.2carpros.com/forum/automotive_pictures/62217_Ford96Older_1.gif


The difficulty I am having is I cant seem to find your engine in a 95!?
Was this
answer
helpful?
Yes
No
Monday, April 20th, 2009 AT 11:00 AM
Tiny
MOBIMARK
  • MEMBER
Hi. I have checked/tested for vacuum leaks. No I haven't checked the codes. Are you able to give me some guidance or direct me to a site detailing how the codes are read?
Was this
answer
helpful?
Yes
No
Monday, April 20th, 2009 AT 11:24 AM
Tiny
MERLIN2021
  • EXPERT
If your DLC(data link connector) looks like this, read em this way.


http://www.2carpros.com/forum/automotive_pictures/62217_Escorta_1.jpg



http://www.2carpros.com/forum/automotive_pictures/62217_escortb_2.jpg



http://www.2carpros.com/forum/automotive_pictures/62217_escortc_2.jpg



http://www.2carpros.com/forum/automotive_pictures/62217_escortd_1.jpg


EQUIPMENT HOOKUP Using Analog Volt-Ohmmeter (VOM) 1) Turn ignition off. Locate Data Link Connector (DLC). See Fig. 1 . Connect positive (+) lead of VOM to PCM STO terminal at DLC and negative (-) test lead to engine ground (GND). See Fig. 2 . Set VOM to 0-20V DC range. 2) Connect a jumper wire between ground and PCM STI terminal of DLC. See Fig. 2 . Using Malfunction Indicator Light (MIL) Check MIL operation. Turn ignition switch to ON position. If MIL is on, MIL circuit is okay. Go to next step. If MIL is off, go to CIRCUIT TEST MIL. After performing CIRCUIT TEST MIL, return to this procedure. Connect a jumper wire between ground and PCM STI terminal of DLC. See Fig. 2 . Using Super Star II Tester 1) Turn ignition off. Connect color-coded adapter cable leads to Super Star II tester. Connect service adapter cables to vehicle Data Link Connector (DLC). See Fig. 1 . 2) Connect Super MECS Adapter (007-00049 or 007-00052) between adapter cables and vehicle DLC. Slide adapter switch to EEC/MECS position. Slide Super Star II tester switch to EEC/MECS position. Using New Generation Star Tester 1) Turn ignition off. Connect power cable and data cable to scan tester. Connect Rotunda Super MECS Adapter (007-00052) to scan tester data cable. 2) Plug matching connector on Super MECS adapter into vehicle DLC. Slide switch on Super MECS adapter to PCM position. Plug power cable on scan tester into cigar lighter or use battery adapter. Using Aftermarket Scan Tester Follow manufacturer's instructions to hook up equipment and record trouble codes. Fig. 2: Identifying Data Link Connector Terminals Courtesy of FORD MOTOR CO. NOTE: After performing equipment hookup, follow appropriate quick test procedures based on type of equipment being used. See QUICK TEST. Page 1 of 1 TESTS W/CODES - EEC (1.8L) -1995 Ford Escort 4/20/2009
Was this
answer
helpful?
Yes
No
Monday, April 20th, 2009 AT 12:26 PM

Please login or register to post a reply.

Recommended Guides