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  #1  
Old 06-24-2009, 04:51 PM
HarveyT1184 HarveyT1184 is offline
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Question 98' 3.0L... No acceleration, power, or pep

This vehicle has been nothing but trouble from day one. I've replaced upstream o2sensor, ERG valve, Fuel Filter, Fuel Pump (all suggested by a mechanic). The truck is not running the way a v6 should, when pulling a small hill the truck barely peaks at 35mph even when at full throttle, it seems to lag and bog down even in 1st gear and there is an absence of any power whatsoever. Really would appreciate help from some of you Ranger enthusiast before i sell this problem away. thanks...
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Old 06-26-2009, 10:54 AM
cdncowboy cdncowboy is offline
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My old ranger had that problem .. I know it;'s gonna sound dumb but My cat was plugged

or in My other ranger .. it was that modual on the back of the distribtor
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Old 07-22-2009, 07:43 AM
yodapuff87 yodapuff87 is offline
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Exclamation 98 Ford Ranger -- Runs excellent! -- But POWERLESS

I would like to get a group of guys together online to brainstorm to resolve this 3.0 liter torque to power deficiency. It appears to be a problem with 3.0 liters (Fords especially) in general.

Anyone who has found the absolute solution to this, please post it. All of us 3.0 liter owners would GREATLY appreciate it.

It's like the power is there, but just can't release itself. Uhhhg!

Thanks for any and all responses to this post!
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Old 07-23-2009, 12:02 AM
Doomshanks Doomshanks is offline
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Default Plausable solution for loss of power

Check the computer for corrosion, actually remove it from the passenger side panel in front of the door and seperate the ECU from the harness. There is a flaw in the ranger's drainage system that directs water down to a corrosion holding point near the antenna actually behind the body panel. This point sits directly over the computer. If the terminals of the computer are corroded then this is the problem with the fuel management system...maybe. It worked for me, i have a 92'. I swapped the computer from a junk yard and siliconed up the cracks after filling them in with "great stuff". Fired it up and it ran like a completely different truck.
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Old 07-27-2009, 10:48 AM
yodapuff87 yodapuff87 is offline
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Thumbs up Response to plausible power loss solution...

Thank you for this tip. I am going to replace my ECU and see if that will be yet another improvement of my missing torque/power.
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Last edited by yodapuff87; 07-27-2009 at 10:53 AM.
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Old 07-27-2009, 11:10 AM
mr.ranger mr.ranger is offline
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harvey, sounds like you have had most of the fuel delivery checked except for the FUEL INJECTORS which may be clogged, good idea to get a new fuel pump and filter though, also how old is the truck? another way for this problem is a "dirty gas tank" with excessive amounts of rust and cra, at the bottom, this jams up ht ewhole delivery system, including the filter and injectors, however you should attempt a diagnostic test on the injectors first as the can be very expenive and like hundreds of dollars each(so if you have the I4 engine then even $200/injectors would be $800 before labour and taxes)...good luck man
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  #7  
Old 07-27-2009, 01:40 PM
yodapuff87 yodapuff87 is offline
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Exclamation Torque to Power Improvement(s)

My K&N Cold Air Intake Kit just arrived. I'll be installing it tonight. Looking forward to see how much torque improvement (if any) I receive. Should make a moderate difference though.

I also plan on having my injectors cleaned professionally at $20 per. A pretty fair price considering the cost to replace them.

P.S.
So I also scored a site find thoroughly covering the Ford 3.0 Liter Vulcan engine; including suggestive modifications. Enjoy!
http://www.therangerstation.com/tech...rformance.html

yodapuff
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Last edited by yodapuff87; 07-27-2009 at 02:57 PM.
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Old 07-28-2009, 06:32 AM
mr.ranger mr.ranger is offline
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thanks for the site, do you know of any 4.0L engine sites or are the two engines similar enough to just refer to that site???
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Old 07-28-2009, 09:03 AM
yodapuff87 yodapuff87 is offline
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Talking Follow up to No Accel...

I would look for a site/information dedicated to the 4.0 liter. The designs are different to serve different purposes. I'll keep my eyes open (do some searches) for more information about the 4.0 liter. My last Ranger was a 4.0 liter. Great engine. Still out there running w/328,000 miles on it.
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Old 07-28-2009, 09:23 AM
RangerJustin RangerJustin is offline
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Just remember in 01, the 4.0 went from an OHV to an SOHC.
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Old 07-28-2009, 10:32 AM
yodapuff87 yodapuff87 is offline
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Installed the new K&N Cold Air Intake Kit AND a new fuel filter last night. Nice improvement to the 3.0 liter. The next step is going to be removing the injectors and having them cleaned at $20 per injector. That should give me back some torque to power ratio.
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Old 07-28-2009, 03:20 PM
mr.ranger mr.ranger is offline
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true, but both engines are indeed great...aslo, over 300,000 miles is amazing but its what you expect from rangers
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Old 07-28-2009, 03:24 PM
mr.ranger mr.ranger is offline
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also, i was thnking about the injectors and since your ranger has lots of miles, you woul be better off doing any diagnostic checks on the injectors(id applicable), then just get them professionally cleaned like someone else mentioned, that way preformance should be better if the injectors were the problems and if it turns out to be something other than the injectors, then you arewnt out like hundreds and hundreds of dollars...also, are you sure your entire exhause system is fine(especially the cat) because its amazing what the effect of a clogged cat can have on your power output
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  #14  
Old 07-29-2009, 07:20 AM
yodapuff87 yodapuff87 is offline
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Thumbs up 98' 3.0L... No acceleration, power, or pep

Yeah, I agree with the suggestion regarding pulling my injectors and getting them professionally cleaned and calibrated.
Also, my buddy and I were discussing the CAT this morning. Since I did just have a ton of work (necessary maintenance) done. I am going to have a compression test done on it (the engine). The exhaust is four years old, but I'm not sure if the CAT was replaced/serviced at the time. That is going to be something else that will be addressed.
It is definitely running STRONG since ALL the seals, gaskets and sensors were replaced a few weeks ago. Adding the complete K&N Cold Air Intake kit and changing the fuel filter two days ago was also a plus.
My plan next is:
1. have the injectors cleaned and calibrated
2. engine compression test
3. fuel pump test
4. check the catalytic converter to see if it is plugged
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Last edited by yodapuff87; 07-29-2009 at 07:29 AM.
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  #15  
Old 07-29-2009, 12:42 PM
yodapuff87 yodapuff87 is offline
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Thumbs up 98' 3.0L... No acceleration, power, or pep

Updates to engine compression testing. Good news that it was 170 all the way around.
Now it's time to test the fuel pump and then the catalytic converter.
I will still be having my injectors cleaned and calibrated on top of the testing. I should be close to gaining back my torque.
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