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surging 3.0 liter ford


Sent to Car Experts February 02, 2005 11:10 p.m.
i have a 1994 ford ranger with a 3.0 liter motor. the problem i am having is surging and pinging underload. i have replaced the tp sensor and disconected the battery for 5 minutes and the problem seemed to be gone only to return wiyhin 5 miles. any sugestions would help. thank you.
Customer (name blocked for privacy)
Status: Closed   Value: $10   
Info Request
February 02, 2005 11:20 p.m. (9 minutes and 57 seconds later) 		REPLIED to Info Request Check Mark
 Did you just get gas? it may be just bad gas, try fuel additiveImages available only to Customers.
carrdoc  -- Auto Service Technician -- No feedback on 2 Car accepts
25 yrs foreign car repair
Reply to john
Sent February 02, 2005 11:32 p.m. (11 minutes and 48 seconds later)
no i have purchased fuel at two different stations.
Customer (name blocked for privacy)
Answer
February 02, 2005 11:48 p.m. (16 minutes and 43 seconds later) 		REPLIED Check Mark
  If you are experiencing pinging I would check your timing and your Egr valve to make sure it's opening Also check the knock sensor if so equiped. Best bets are timing or EGR.
PictureMarc  -- Technician,Auto -- 98% Positive Feedback on 1027 Car Accepts
32 years exp. automotive repair NYS emisisions repair cert.
Info Request
February 03, 2005 5:25 a.m. (5 hours and 36 minutes later)
 Did you disconnect the battery because the check engine light was coming on?. If so have the codes read and give us the numbers.
PictureTech501  -- Auto Service Technician -- 96% Positive Feedback on 739 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply to enginboy
Sent February 09, 2005 9:59 p.m. (6 days and 16 hours later)
base timing is corect and egr valve and evr are new also this motor has no knock sensor.
Customer (name blocked for privacy)
Reply
Sent February 09, 2005 10:02 p.m. (2 minutes and 49 seconds later)
111 in koeo test 111 in koer test
Customer (name blocked for privacy)
Answer
February 09, 2005 10:05 p.m. (3 minutes and 40 seconds later)
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PictureTech501  -- Auto Service Technician -- 96% Positive Feedback on 739 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
Sent February 09, 2005 10:10 p.m. (4 minutes and 34 seconds later)
maf is new as air charge temp sensor and tp sensor. the truck runs well in open loop and at full throttle it seems to be at its worst at part throttle under load.
Customer (name blocked for privacy)
Answer
February 09, 2005 10:16 p.m. (6 minutes and 18 seconds later)
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PictureTech501  -- Auto Service Technician -- 96% Positive Feedback on 739 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
Sent February 09, 2005 10:22 p.m. (5 minutes and 36 seconds later)
yea i figure i'm going to have to have someone with a more sofisticated scan tool have a look because i can't keep throwing money at this turd. when yuor codes are clean you are left guessing. the only thing i have not changed yet is the o2 sensors .
Customer (name blocked for privacy)
Info Request
February 09, 2005 10:27 p.m. (5 minutes and 25 seconds later)
 Stop throwing parts at it and have somebody knowledgable in driveability analyze to data before going any further. All that data will tell a story if you know how to interpret it. It may be a bad computer in the end.
PictureTech501  -- Auto Service Technician -- 96% Positive Feedback on 739 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
Sent February 09, 2005 10:46 p.m. (18 minutes and 21 seconds later)
       at this point i can't argue with that. thank you and have a good night . rich roani .
Customer (name blocked for privacy)
Answer
February 10, 2005 4:11 p.m. (17 hours and 25 minutes later)
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carrdoc  -- Auto Service Technician -- No feedback on 2 Car accepts
25 yrs foreign car repair
Reply
Sent February 10, 2005 8:50 p.m. (4 hours and 38 minutes later)
        i checked base timing with spout disconected and is at the correct 10 degrees
Customer (name blocked for privacy)
Answer
February 10, 2005 8:55 p.m. (4 minutes and 51 seconds later)
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PictureTech501  -- Auto Service Technician -- 96% Positive Feedback on 739 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
Sent February 10, 2005 9:04 p.m. (8 minutes and 44 seconds later)
          i went to work a different way today which involves getting right off the highway to ahalf throttle hill climb at 50mph and i expierienced none of the surging that i usually have that is until the road leveled out and throttle opening closed up. this makes me think my o2 sensors are not staying up tp temp around town. how about that for a theory?
Customer (name blocked for privacy)
Answer
February 10, 2005 9:09 p.m. (5 minutes and 34 seconds later)
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PictureTech501  -- Auto Service Technician -- 96% Positive Feedback on 739 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
Sent February 10, 2005 9:16 p.m. (6 minutes and 38 seconds later)
             well i have an appointment at the ford dealer on the 17th anyway , but i am determined to come up with an answer . i'm not usually stumped like this , obviously or i would'nt be at this site.
Customer (name blocked for privacy)
Reply
Sent February 13, 2005 9:27 p.m. (3 days and 0 hours later)
             just a note. i changed first the right o2 sensor which got rid of 80% of the surge and replacing the left got rid of the rest. so a clean trouble code does'nt mean a whole hell of a lot in my book. thank you for your help and suggestions and your time. sincerly rich roani.
Customer (name blocked for privacy)
Info Request
February 13, 2005 9:32 p.m. (5 minutes and 6 seconds later)
 An O/2 not crosscounting from rich to lean will promp a code to be set if the computer is working properly.
PictureTech501  -- Auto Service Technician -- 96% Positive Feedback on 739 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance

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