Hard Starting one more time
Thread Starter
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Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
Guys, I have not had a chance to get a fuel pressure tester yet, but I am going to, and follow the dirrections to test my entire fuel system, I really don't plan on just throwing parts and money at it.
However, this weekend I changed the 02 sensor with no change in this condition.
I had truck put on a computer week before last and they could not find anything wrong, and found no codes.
I've been starting this truck just like your supoes to with fuel injuction:turn key to on for a few seconds then to start from there.
It is getting much worse now, and I smell gas right after it starts, and it runs just a hair rough for about a minute after starting as well, not super noticeable though.
However, this weekend I changed the 02 sensor with no change in this condition.
I had truck put on a computer week before last and they could not find anything wrong, and found no codes.
I've been starting this truck just like your supoes to with fuel injuction:turn key to on for a few seconds then to start from there.
It is getting much worse now, and I smell gas right after it starts, and it runs just a hair rough for about a minute after starting as well, not super noticeable though.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
You don't need any scantool to pull codes from an EEC-IV ('84-95) computer - just a paperclip. Read this thread.
Have you checked the red FPR vacuum line for liquid gasoline yet?
Have you checked the red FPR vacuum line for liquid gasoline yet?
Thread Starter
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Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
Steve83, I haven't checked the red FPR line yet. as I don't know what it is, I'm new to all this fuel injected, computer controled stuff, I assume that the red FPR line IS NOT supoes to have liquid gasoline in it, I'll check it this morning and advise.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Fuel in the vacuum line means that the FPR's diaphragm has ruptured, and gas is being pumped (by the fuel pump) AND sucked (by the engine vacuum) into the intake manifold. This will create a rich condition that can quickly damage the engine, catalysts, and your wallet.
Thread Starter
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Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
Guys, The problem got somewhat worse yesterday (Monday) on way to work...my check engine light came on 6 times for just under a minute then went back off, I thought great, now may be there will be a code for someone to find and tell me just what this trouble is once and for all, but no, on the way home (13 miles) the light didn't come on one time, but yesterday when it did the engine pinged (spark-knocked) the whole time the light was on like it does when climbing a hill with the 87 octane gas I'm running, I hope to take the time to check the FPR line today and see if I can see any liquid gasoline.
BTW what is the diaphram called that it is hooked to Steve83??
Thanks!!
BTW what is the diaphram called that it is hooked to Steve83??
Thanks!!
Senior User
Joined: Nov 2002
Posts: 158
Likes: 0
From: Champlin USA
well, pinging noises mean predetonation which would mean your timing is off. if your check engine light came on i would think that a code would be stored in the computer. the check engine light doesnt have to stay on to have a code be stored. ive had my puter store codes and my check engine light never even came on once. and FPR, i think, stands for fuel pressure regulator and i would guess thats what that diaphram does (although im new to that one too).
Last edited by bourbon; Nov 25, 2003 at 08:47 AM.
Senior User
Joined: Mar 2003
Posts: 470
Likes: 0
From: NE TX
The fuel pressure regulator keeps set pressure to your injectors by restricting or opening your return line. EFI requires proper fuel pressure. If there is gas inside the vacuum line, the regulator is leaking and your fuel pressure will be off. There is a FPR test you can do with the $40 fuel gauge. But if there is fuel in the red line, replace the fuel pressure regulator. If not then I suggest checking fuel pressure with gauge and check for any codes. These checks plus timing keep EFI engines going. There are too many sensors and gadgets to replace at every maintenance period. BTW, the diaphram will be inside the FPR. Most anything that pumps (or makes pressure) or measures pressure will have a diaphram.
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Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Tim is right about the diaphragm inside the FPR, and this thread tells how to get codes out of the engine light with a paperclip. It's the official Ford procedure. Here's the complete code list.
