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Old 11-22-2011, 02:42 PM
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intermitten miss

I have a 1988 ranger 2.9 motor 4 wheel drive .I drive about 20 to work the problem is when I first start out and about the first 10 miles or so the truck runs good and then it starts to miss then going home the same thing....I have a new cap and rotor plug wires and spark plugs I just don't know what else could be bad thanks for helping in advance jdhemin

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Old 11-22-2011, 04:24 PM
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Could be a coil pack or even a injector. JMO but i would plug a analyzer in before i went to throwing parts at it. IMHO



Cole
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Old 11-22-2011, 04:41 PM
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Sounds like it is missing after it goes closed loop. Bad O2 maybe leaning it out
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Old 11-22-2011, 05:15 PM
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What Cole said. I had to replace a coil pack on my 2001 four cylinder. Once done, it runs like a champ.

Pat
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Old 11-22-2011, 07:12 PM
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I'm w/T on this one- sounds like it's crapping out once it warms up fully and goes to closed loop, when the computer takes over the fuel and spark. Not that the plugs couldn't be bad- but I'd want to pull the computer codes, even if the MIL isn't lit.

Could be the O2 sensor, temperature sensor switch, TPS...
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Old 11-25-2011, 02:17 PM
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the computer is not throwing codes at least the engine light is not comming on ...But I will shut the motor off run into the store and come out and the thing runs fine(sometimes not always)....I had computer problems this last summer went out twice (bad ground we think) but other than that it runs fine but boy when its missing that realy sucks gas just to shed some more light on whats going on .....thanks jdhemin
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Old 11-25-2011, 02:19 PM
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Oh I almost forgot thanks to the guys for throwing me some Ideas .Thanks again jdhemin
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Old 11-25-2011, 03:15 PM
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Quote:
Originally Posted by jdhemin
Oh I almost forgot thanks to the guys for throwing me some Ideas .Thanks again jdhemin
It's a good idea to check for codes even if the check engine light (aka "MIL") isn't lit.

If the sensors go out the default setting will nearly always always be a safe one- i.e. rich fuel calibration, less rather than more timing, etc. This will always cause the economy to tank and performance to suffer- but that way the engine is more likely to survive until the problem is fixed.
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Old 11-25-2011, 03:59 PM
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Rangers didn't get the CEL until the dashboard change in 1989. With an '88, you have to check the codes with the connector under the hood. you can jumper it and check with a volt meter

http://www.troublecodes.net/Ford/
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Old 11-25-2011, 04:28 PM
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Not to argue, but it seems some had a CEL- http://autoforums.carjunky.com/Autom..._light_P30144/. Or the guy doesn't know what year truck he owns.
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Old 11-26-2011, 09:08 AM
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My brother came over last night with his code reader which cost him about a thousand dollars and two hundred a cartridge for the different cars and trucks and he couldn't get no coded even when riding down the road and yes my truck has a cel and it is a 1988 thanks jdhemin
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Old 11-26-2011, 09:42 AM
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Quote:
Originally Posted by jdhemin
My brother came over last night with his code reader which cost him about a thousand dollars and two hundred a cartridge for the different cars and trucks and he couldn't get no coded even when riding down the road and yes my truck has a cel and it is a 1988 thanks jdhemin
But was it doing the miss thing when he was monitoring it?
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Old 11-26-2011, 01:45 PM
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If you have a good scanner and it sounds like you do, you should be able to look at the O2 to see if it is switching. Should be a constant toggle from 0v to about .9.
If his scanner wont give you that info, you could try unplugging the O2 and take it for a ride. The computer will go to a mid setting if you do this. It will most likely put the CEL on but it may tell a story.
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Old 11-27-2011, 07:35 AM
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We had to drive it almost 20 miles before it started missing still no codes and it was hooked for the total of 42 miles I'm going to try o2 censer and see what happens probaly won't be til tonight I'm at work right now I get off at 4:00 pm if it changes things I'll let you all know and thanks again jdhemin
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Old 12-04-2011, 01:04 PM
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i HAVEN'T TRIED THE 02 SENCER yet but when the cold weathyr set in the miss didn't miss is that still the 02 sencer?????
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