The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-21-2011, 03:34 PM   #1
cpisani70@aol.com
Registered User
 
cpisani70@aol.com's Avatar
 
Join Date: Oct 2010
Location: Wallingford CT
Posts: 260
Ignition timing ?

Everything was going along just fine today I had a successful maiden voyage, then the next short ride was a flop. I got her home it will idle fine but has no power at all. I put a new fuel filter but it is still the same I am sure the timing is off and was wondering what the timing for a 402 should be any other help would be great! The truck is all stock . I here that those original carbs are no good but it seemed fine up until today
Posted via Mobile Device
cpisani70@aol.com is offline   Reply With Quote
Old 05-21-2011, 03:46 PM   #2
cpisani70@aol.com
Registered User
 
cpisani70@aol.com's Avatar
 
Join Date: Oct 2010
Location: Wallingford CT
Posts: 260
Re: Ignition timing ?

If it helps at all if it sits for a few minutes and I start it , it runs decent until I start driving then I lose power, starting to think I have a carb problem idk
Posted via Mobile Device
cpisani70@aol.com is offline   Reply With Quote
Old 05-21-2011, 04:53 PM   #3
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
Re: Ignition timing ?

A new filter?? An inline type or the one in the carb inlet.
geezer#99 is offline   Reply With Quote
Old 05-21-2011, 06:03 PM   #4
into69z
"brand new second-hand"
 
into69z's Avatar
 
Join Date: Feb 2007
Location: White House, Tennessee
Posts: 526
Re: Ignition timing ?

sounds like it's running on the fuel in the bowl when you start up then as you drive, the fuel doesn't keep up with the demand-check all filters-check fuel pump-is the tank getting vented? How does the fuel line look from the tank to the carb-any flat spots or crimped hoses or lines?
__________________
Steve
69 3/4t custom camper
tilt,am/fm,speed warning,air gauge,buddy buckets,aux battery, big block,p/s,p/b,a/c
67 Camaro
96 Impala ss-sold
04 hybrid Honda-saving gas for the blue truck!:
b69:
into69z is offline   Reply With Quote
Old 05-21-2011, 07:59 PM   #5
cpisani70@aol.com
Registered User
 
cpisani70@aol.com's Avatar
 
Join Date: Oct 2010
Location: Wallingford CT
Posts: 260
Re: Ignition timing ?

The filter is the one in the carb no in line filter the fuel pump is brand new all the lines look good no kinks . What is the vent issue my 68 only has one line coming from the tank so I never thought of that what do I look for? In the meantime cause I can never sit still I took the carb all apart and found a lot of junk in the bowl this was my first go at something like that but I figured the only thing I would want in the bowl was just clean fuel?
Posted via Mobile Device
cpisani70@aol.com is offline   Reply With Quote
Old 05-21-2011, 11:09 PM   #6
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
Re: Ignition timing ?

Is the filter in correctly. IIRC the hole in the filter body is towards the fuel pump. and there should be a spring in there too. Sounds like it's running out of fuel.
geezer#99 is offline   Reply With Quote
Old 05-22-2011, 10:00 AM   #7
Wrenchbender Ret
Registered User
 
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
Re: Ignition timing ?

You need to put an inline filter between the tank & pump. That trash can get in the fuel pump vales & cause a loss of pressure.
Wrenchbender Ret is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:11 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com