91 Ranger
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91 Ranger
Hi im new here but i have a 91 Ford Ranger XLT and so the problem is that i have lose of power and im getting a code on my OBD-1 scanner that basicly says that its running lean and it just started out of no where i have replaced these sensors and parts
TPS
MAF
IACV
Fuel Pressure Regulator
Fuel Pump
as so far it hasnt fixed anything it will high idle and then kick down and sound like shes about to stall out ive been told to try to replace my O2 sensor but unsure if i should because ive spent my whole first paycheck trying to fix my baby need advice
TPS
MAF
IACV
Fuel Pressure Regulator
Fuel Pump
as so far it hasnt fixed anything it will high idle and then kick down and sound like shes about to stall out ive been told to try to replace my O2 sensor but unsure if i should because ive spent my whole first paycheck trying to fix my baby need advice
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i dont know what i did but today me and a buddy went over everything and tighten everything best we could to torque specs and it just stopped it idles alittle high but not to much to make me worry
Hotshot
Joined: Jun 2015
Posts: 12,877
Likes: 2,446
So basically you started off with a high idle problem. Didn’t do any diagnostic testing such as running the Key On Engine Off (KOEO) self test to check for active and stored codes. Then threw your wallet at it by replacing parts that were more then likely still good only to still have a high idle which you are “ok” with.
I think oldandcrotchety nailed it with the vacuum leaks as the cause of the high idle. Either broken hoses or the intake manifold gasket(s).
You really need to diagnose problems and only repair/ replace what is broken or else you will quickly become poor, frustrated and end up junking the truck.
I think oldandcrotchety nailed it with the vacuum leaks as the cause of the high idle. Either broken hoses or the intake manifold gasket(s).
You really need to diagnose problems and only repair/ replace what is broken or else you will quickly become poor, frustrated and end up junking the truck.
Thread Starter
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New User
Joined: Mar 2021
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So basically you started off with a high idle problem. Didn’t do any diagnostic testing such as running the Key On Engine Off (KOEO) self test to check for active and stored codes. Then threw your wallet at it by replacing parts that were more then likely still good only to still have a high idle which you are “ok” with.
I think oldandcrotchety nailed it with the vacuum leaks as the cause of the high idle. Either broken hoses or the intake manifold gasket(s).
You really need to diagnose problems and only repair/ replace what is broken or else you will quickly become poor, frustrated and end up junking the truck.
I think oldandcrotchety nailed it with the vacuum leaks as the cause of the high idle. Either broken hoses or the intake manifold gasket(s).
You really need to diagnose problems and only repair/ replace what is broken or else you will quickly become poor, frustrated and end up junking the truck.
Hotshot
Joined: Jun 2015
Posts: 12,877
Likes: 2,446
Did you remove the throttle body to replace the TPS? If so, did you use a new gasket? Have you been using Motorcraft electrical parts when available: new aftermarket sensors don’t necessary mean that they are good.
1,300-1,400 rpm is almost twice the normal idle speed.
1,300-1,400 rpm is almost twice the normal idle speed.
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Trublufords
1983 - 2012 Ranger & B-Series
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Jun 14, 2004 07:22 PM
