Starting problems
Junior User
Joined: Jul 2003
Posts: 88
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From: Vancouver, WA
Starting problems
couleeman, did you ever test your fuel pressure? It sounds to me like a fuel system problem. If the fuel system pressure is low, a "hot soak" will cause fuel to boil to a vapor in the fuel rail. The injectors can't inject vapor; they need liquid fuel to do their thing. That's why FI systems have 35 PSI instead of the 7 PSI carburetors use. A weak fuel pump can give you this kind of intermittent failure. My money is on the fuel pump at this point.
It is a dirty job, but you gotta do what you gotta do, right? Oh, by the way, wear some safety goggles or something. Gasoline in my eye felt pretty awful. Luckily I was able to wash it out within a few seconds (I had a half-full water bottle within arm's reach!) but you're really better offkeeping the gas out in the first place.
It is a dirty job, but you gotta do what you gotta do, right? Oh, by the way, wear some safety goggles or something. Gasoline in my eye felt pretty awful. Luckily I was able to wash it out within a few seconds (I had a half-full water bottle within arm's reach!) but you're really better offkeeping the gas out in the first place.
Senior User
Joined: Jun 2003
Posts: 114
Likes: 2
From: Harlan, KY
Starting problems
I bought a fuel pressure gauge from advance for about $35. It goes on a shrader valve on the fuel rail. (remember to lube the O ring) An I-6 should have 50 - 60 psi. An extension can be made from a grease gun hose. This will allow you to read pressure while driving. (a risky setup at best) I zip tied it to the wiper arm an used a 1/2 inch bit of plywood to keep the hood from crimping the hose. A good pump will maintain pressure.
I recently replaced the fuel pressure regulator on my I-6 with a new one from advance. It measured at a lower pressure. It seems that the V-8's run a lower pressure, but Advance had only one part number for all 89 F-150's. Put the old FPR back and had good pressure. Has the FPR been ghanged at any time?
I recently replaced the fuel pressure regulator on my I-6 with a new one from advance. It measured at a lower pressure. It seems that the V-8's run a lower pressure, but Advance had only one part number for all 89 F-150's. Put the old FPR back and had good pressure. Has the FPR been ghanged at any time?
Freshman User
Joined: Sep 2002
Posts: 49
Likes: 0
From: Sullivan, IN
Starting problems
Well good news here one and all, I seem to have fixed my problem with it not starting when hot. I pulled the SPOUT jumper out and the timing was set at 26 degrees instead of 10. I set it about 11 and it starts great hot. Once and a while it is a little sluggish but I think the starter has been through heck so I think it may be a little weaker so I'm gonna change it out this week and the problem should be totally fixed. Thank you all for your help and ideas I'll keep in touch on this and if I can help at any time I will. Once again thanks all.
New User
Joined: Dec 2003
Posts: 18
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I'm wondering if a fix was ever found out on this. I'm having the exact same problem. Starts up fine cold, but when warm it take a about 10 cranks and then starts up, but it is rough then clears right up after warmup cycle. Any ideas?
Freshman User
Joined: Sep 2002
Posts: 49
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From: Sullivan, IN
Well I'm back again, I did change the starter and put an additional heat shield around it. Changed the O2 and TPS (throttle positions sensor) and by doing that it changed the timing once again by about 3 degrees. But it is getting hard to start when hot again. If it let it sit 10 min it will fire right up. A 20 min trip at 55 then shut it off then ya have to wait for it to cool off for 5 min before it will start. I have checked the fuel rail cooling fan and everything is in order. Any more ideas?
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Posting Guru
Joined: Jan 2003
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From: Magrath
Try the fuel pressure Regulator.
The neighbor is replacing mine this weekend. He said he got a tech bulletin regarding the same starting problem. When he checked my fuel pressure regulator it was wet from fuel, so he told me to buy a new one and he would put it in.
I will let you know if it works.
The neighbor is replacing mine this weekend. He said he got a tech bulletin regarding the same starting problem. When he checked my fuel pressure regulator it was wet from fuel, so he told me to buy a new one and he would put it in.
I will let you know if it works.
Last edited by couleeman; Feb 24, 2004 at 06:44 AM.
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Posting Guru
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From: Magrath
Originally posted by fallguy
bump:
Any results yet couleeman? Fuel Pressure regulator work?
bump:
Any results yet couleeman? Fuel Pressure regulator work?
I will post as soon as I get it in, I promise. Sorry for making you wait.
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From: Magrath
Nothing like getting on the ball. I finally put in the fuel pressure regulator today. Seemed to make a difference, but I won't know for certian until I drive it a bit further. The truck does run allot smoother though.
Elder User
Joined: Aug 2003
Posts: 545
Likes: 1
From: Houston
dam 26 degrees? no wonder i had that problem a couple of times but i just messed with the battery and it started right up (corroded) i hope yout atleast opening the hood so it cools faster 
, did you pul any codes?
, did you pul any codes?
Last edited by faroffthetrack; Mar 28, 2004 at 12:57 AM.
Post Fiend
Joined: Mar 2003
Posts: 14,413
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From: Sarnia, Ontario, CANADA!
Someone mentioned it but I am not sure if you have done it yet (I just skimmed through the posts). If it is not fixed replace your battery cables. Next time your truck does it get a set of booster cables and hook from your negative battery post to a good ground on your engine or frame near engine (preferably a bolt that holds your starter on. Then try to start your truck. If it works you have found the problem. If not do the same thing for your positive cable. Go from the starter to your solenoid. I would be willing to bet that is possibly your problem. I had the exact same problem on TWO of my dad's inline 6 trucks. One was a 89 and one was a 96. Good luck!
-Matt
-Matt
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From: Magrath
It has seemed to do the trick (fuel pressure regulator). I just don't want to post to soon and then have the problem arise again because I didn't get to drive it enough and test it out. I will post by the end of the week to confirm it solved the problem. The old fuel pressure regulator was bad though.