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  #1  
Old June 16th, 2004, 09:16 PM
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Brian Jones
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Engine will not stay running

I have run into this problem before, but it stopped for a couple months. Today the 90 just dies after i let off the gas and push the clutch in. It will not idle on its own. Makes it pretty hard to drive when the idle get low enough it cuts out. Would it be the fuel pump or and ignition problem?
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  #2  
Old June 16th, 2004, 10:10 PM
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Fuel filter.
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  #3  
Old June 16th, 2004, 10:30 PM
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Stepper motor.

clean and refit--if persists, replace.

Ron
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  #4  
Old June 16th, 2004, 10:38 PM
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Where would i find the stepper motor? How does it come out? I wonder if it would be hte fuel filter. Now it will not start on its own, i gotta push the gas when cranking it to get it rev.
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  #5  
Old June 17th, 2004, 06:08 AM
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Nicholas Orros
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Hey Mike,

How often do you change the fuel filter ?

I did mine 2 yrs ago, maybe have 20k on it.

Mine shuts off sometimes, right when I start it, generally when it is VERY HOT outside, like it is a lot in Tallahassee, Florida. When I start it the second time though, it's perfect, every time. hmm ?

Thank you & sorry for hi-jacking post somewhat !!

Nicholas
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  #6  
Old June 17th, 2004, 07:31 AM
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Rich Campbell
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Mine just started to do this yesterday. When I come to a stop light it stalls sometimes. It has always idled perfect. I was actually going to post this question today. I also have no idea where the stepper motor is. Also, how difficult is it to replace the fuel filter?
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  #7  
Old June 17th, 2004, 08:20 AM
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Honestly my PO replaced the fuel filter right before I bought my 90 so I have never replaced it in the 1 1/2 years of owning it. But I remembered that I sometimes would have a stalling issue at stop lights, it was due to the sparkplug wire ends getting wet and corroded on the Cap end. I pulled them off, cleaned them up and no more problems. They became corroded from allot of rain, they were not pushed on very tight, and the rubber boot was slid back on a few of them. I'll let Ron handle the stepper motor questions as I have not had to do anything with mine (replaced by PO ) and as far as the fuel filter, look under the passenger side along the frame between the front and rear tires. Another thing to check is the wires them selves, if they are old and warn then you may need to replace them. A little story to all; My PO brought the 90 in for service due to the same problems, had all of the above replaced and more including the timing chain! Then they replaced the cheap old fuel filter and it ran fine. So replace the cheap stuff first, it will save you allot in the long run!
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  #8  
Old June 18th, 2004, 03:39 PM
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Simon Marxer
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I am plauged by the same problem! I am relieved to hear I am not alone. Would these solutions go for my 110 also?
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  #9  
Old June 18th, 2004, 03:53 PM
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Quote:
Originally Posted by Marx-110
I am plauged by the same problem! I am relieved to hear I am not alone. Would these solutions go for my 110 also?
Yep!
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  #10  
Old June 18th, 2004, 04:37 PM
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Any help with the stepper motor??
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  #11  
Old June 18th, 2004, 05:20 PM
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Stepper motor is essentially on the back of the plenum in front of the airbox . If you're looking at the motor, it's at the back on top on the left (how's that for a horrible desciption). look for a black octagonal plug. Disconnect plug, unscrew stepper. Replace with the factory part as the napa cross-reference never seems to work. And this could certainly be the culprit. Try DAP for the part, they were the cheapest last I checked.

Good luck.
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  #12  
Old June 19th, 2004, 10:08 AM
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Chris Davis
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I would clean the stepper before replacing it--and you can visually inspect the motor by turning the car on with it unplugged and seeing if it is retracting/extending.
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  #13  
Old June 21st, 2004, 10:46 AM
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How difficult is it to replace the fuel filter?
Thanks
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Old June 21st, 2004, 10:59 AM
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1. I think you may want to invest in a workshop manual.
2. Look under the passenger side of the truck along the outside of the framerail. One bolt holds the filter bracket and the fuel lines unscrew from the filter. Filters can be found at most car parts places.
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  #15  
Old June 21st, 2004, 11:22 AM
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Yeah I'm tring to find a manual. I keep seeing the cd ones on ebay I'm just not sure if they are any good. My question with the fuel filter is if you have to drain fuel from the lines before swapping it or do you just unscrew it and attach the new one.
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Old June 21st, 2004, 11:25 AM
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I think the *proper* way to do it is to pull the fuel pump relay to depressurize the system. I just pull it apart and put a glass bowl under the filter to collect the gas (or just park on weeds and then I can say I did some yard work as well).
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  #17  
Old June 21st, 2004, 11:33 AM
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Thanks
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  #18  
Old June 21st, 2004, 11:36 AM
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Quote:
Originally Posted by Campbell
Yeah I'm tring to find a manual. I keep seeing the cd ones on ebay I'm just not sure if they are any good. My question with the fuel filter is if you have to drain fuel from the lines before swapping it or do you just unscrew it and attach the new one.
Rich, Call Rovers North! They have a good manual for $50!
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Old July 14th, 2005, 03:51 PM
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Here's a picture of the stepper removed & cleaned. The manual I have calls it the idle air control valve and it's in the fuel system section 19-9.

I was going to ask a question but after taking it out and cleaning it the stalling problem seems to have stopped.

I had this problem late last year and the garage changed the fuel filter, the plug wires, and distributor cap.
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  #20  
Old July 14th, 2005, 03:54 PM
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You may also want to clean where it goes into. And yeah, stepper IAC it'a all the same.
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