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Puzzled
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Topic: Puzzled (Read 1829 times)
Tazman
Junior Member
Posts: 774
Puzzled
«
on:
January 29, 2013, 05:59:20 PM »
Coming home on the freeway my acted like it was going againest very strong wind when the check engine light came on.Within a minute it was gone and running fine,yet did it again a little later.Then it got so bad I started losing speed and was pulling off to the side when it cleared up again and ran great the rest of the way home.Once home I checked the codes to find 33 (Map sensor high voltage) and 44(Lean exhaust.The map sensor was replaced a few months ago the only thing I can think of right away is I was under a quarter tank of gas and might have gotten some junk in the line.I will fill it with gas and try it again in the morning.It has a stock 350 with the TBI and a 700r tranny.Thanks
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Engineer
Senior Member
Posts: 1402
Re: Puzzled
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Reply #1 on:
January 29, 2013, 08:33:25 PM »
Lean code?
Might be the fuel pressure regulator acting up. Other problem could be fuel pump. Do you have dual tanks? Does it do it on both tanks?
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2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454
Dad of an Eagle Scout, and a Life Scout
Tazman
Junior Member
Posts: 774
Re: Puzzled
«
Reply #2 on:
January 29, 2013, 08:52:02 PM »
Yes it has duals but I have never used the other side.The regulator and fuel pump have both been replaced less than a year ago.
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God BLESS AMERICA
bd
Global Moderator
Senior Member
Posts: 6450
Re: Puzzled
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Reply #3 on:
January 29, 2013, 09:06:48 PM »
Check the fuel filter. TBI filters plug easily, because they have a fine micron rating.
Why did you replace the MAP sensor, fuel pump, and pressure regulator?
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)
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Puzzled