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1997 ford f150 stalling out
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mik05
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Jun 13, 2013, 5:32 PM
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1997 ford f150 stalling out
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Have a 97 ford f150 with a 4.6l Triton v8 it runs good but recently having stalling problems. Will run good until I am slowing down to stop or turn in someplace and then it will stall out. Put it back in neutral or park and it starts right back up no issues till next time you slow or stop. I have cleaned the iac valve though it looked pretty much new it was so clean it has new plugs and coil packs air filter is also clean. what do I do please help
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Hammer Time
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Jun 13, 2013, 6:03 PM
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Re: 1997 ford f150 stalling out
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You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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mik05
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Jun 14, 2013, 4:42 PM
Post #3 of 17
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Re: 1997 ford f150 stalling out
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OK I have cleaned the throttle body and changed the idle air control and it is still driving great but when slowing down the idle drops so low that it stalls the motor what else could be wrong
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Hammer Time
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Jun 14, 2013, 4:47 PM
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Re: 1997 ford f150 stalling out
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Pull the vacuum line of the fuel pressure regulator right after the engine has been run and see if there is any fuel in it to indicate a bad regulator. Also remove the EGR valve and see if it is seating fully closed. Look for carbon buildup preventing it from sealing fully.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
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Jun 14, 2013, 5:06 PM
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Re: 1997 ford f150 stalling out
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Check engine light on? Any trouble codes stored in the engine computer?
When it stalls does it chug or just flat out shut off?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 14, 2013, 5:11 PM)
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Tom Greenleaf
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Jun 14, 2013, 8:32 PM
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Re: 1997 ford f150 stalling out
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Have vacuum leaks, especially in molded elbows about these years been checked or ruled out? IDK why but about the year seemed a lot of them were bad when a lot newer than it is now that will throw everything off or begin as just random stalling.
All tests including a wiggle test on the dang things. You should have codes waiting at least but could just confuse the source problem with slight leaks and they can be intermittent,
T
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mik05
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Jun 15, 2013, 7:26 AM
Post #7 of 17
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Re: 1997 ford f150 stalling out
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I have checked the elbows and such and have checked the fuel pressure regulator. The problems started when I was pulling a REALLY almost strait up driveway and it stopped about 3/4 up ad when I tried to back down it sounded like it wanted to stall but didnt now it stalls when I'm slowing down to stop and turn. Just seems like even when in park if you rev the motor up it will go from way up to just about to stall but doesn't. Sometimes not always you can smell a hint of gas but it goes away please help thus truck is getting to be too much of a pain
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mik05
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Jun 16, 2013, 9:17 AM
Post #8 of 17
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Re: 1997 ford f150 stalling out
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It seems that it runs good till I go up or down hill and then when I slow down even on level ground it stalls because the idle drops all the way down. It also has a bad exhaust leak and I'm wondering if that could be causing it
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Hammer Time
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Jun 16, 2013, 9:21 AM
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Re: 1997 ford f150 stalling out
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Have you removed the EGR valve yet?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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mik05
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Jun 16, 2013, 11:10 AM
Post #10 of 17
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Re: 1997 ford f150 stalling out
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Just now and it was a little dirty so I cleaned it real good have not put it back on yet. Curious the pipe that goes from egr to exhaust is not connected it just sits there with nothing holding it tightly together is this normal or could this be my problem
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Hammer Time
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Jun 16, 2013, 11:47 AM
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Re: 1997 ford f150 stalling out
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That's not possible. You would have a major exhaust leak and it would be very loud. You may be referring to the pressure feedback sensor hose. The exhaust feed to the EGR will be metal and bolted together. I don't remember exactly what that one looks like.
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mik05
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Jun 16, 2013, 12:11 PM
Post #12 of 17
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Re: 1997 ford f150 stalling out
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I put the egr valve back on and it is doing the same. In park, neutral it Idles so smooth but once it goes in drive or reverse it drops until it starts shaking a little and about to stall out. The pipe I am referring to screws into egr and goes to the exhaust right at or just below the manifold. The truck is loud so I can't tell if it s because of the connection or lack there of, or another exhaust leak
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mik05
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Jun 16, 2013, 12:13 PM
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Re: 1997 ford f150 stalling out
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What else should I try to eliminate? I am supposed to bring it to get it diagnosed Tuesday but I sure would like to figure it out before then
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mik05
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Jun 16, 2013, 12:59 PM
Post #14 of 17
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Re: 1997 ford f150 stalling out
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Sorry hammer time I meant to say the it is not a hose it is for sure a pipe of some sort but I ant tell what is made of some sort of light weight metal maybe aluminum
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Hammer Time
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Jun 16, 2013, 2:27 PM
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Re: 1997 ford f150 stalling out
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I don't know what to tell you. What you're telling me isn't making a whole lot of sense. I'm assuming you have checked for stored codes.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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mik05
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Jun 16, 2013, 2:50 PM
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Re: 1997 ford f150 stalling out
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Yes I have and sorry but that is exactly what's goin on though. I thought it was weird to but the pipe that screws into the egr is not in any way fastened to the exhaust it just meets up with it but nothing there to keep it in place.
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Discretesignals
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Jun 16, 2013, 3:06 PM
Post #17 of 17
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Re: 1997 ford f150 stalling out
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You should fix the obvious exhaust leak. O2 sensor could be picking up the oxygen from the exhaust leak and causing the PCM to over fuel the engine in closed loop, basically making it flood out.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 16, 2013, 3:07 PM)
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