Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > Vintage RV's
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-25-2012, 02:26 PM   #1
Junior Member
 
Join Date: Mar 2012
Posts: 22
Ignition timing

I have a 1990 Chevy 454 and while have found the way to check the timing, I have not found the spec.. This is Winnebago Chieftan RQ 33. The reason I'm asking is because when I shut the engine off it keeps on running. Thank you so much in advance for your help. Any other suggestions would be greatly appreciated.
Dan
__________________

__________________
Daniel6001 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-25-2012, 02:36 PM   #2
Senior Member
 
ftv37's Avatar
 
Join Date: Mar 2010
Location: Richland,Or
Posts: 101
how do set the timing on a 1990 454 chevy hei engine - JustAnswer

Just to be clear it's 4deg before top dead center
__________________

__________________
ftv37 is offline   Reply With Quote
Old 04-25-2012, 02:42 PM   #3
Member
 
Join Date: Nov 2010
Location: Gainesville, GA
Posts: 38
Being a 1990 the timing may be computer controlled and non-adjustable. The way I check is to pop off the distributor cap and see if the rotor will move without the engine moving. If it will move a couple of degrees you don't have computer controlled timing.

I can't help with the factory spec but with this being a 21 year old engine the factory spec may not be the best to go by. I hook up a vacuum gauge and time it to where I get the best steady vacuum. If I hear pinging on the test drive I back it down a degree or two.

Is it fuel injected or carbureted? Dieseling (run on) could be any number of things but my understanding of the root cause is that you've got enough heat somewhere in the engine/heads/exhaust/plugs to ignite the fuel in the absence of spark. With a carburetor that doesn't have a fuel shutoff solenoid it will deliver fuel as long as the engine is spinning.

I would also suspect it may be a too-lean mixture which could be caused by a number of things. An engine that runs too lean will have high cylinder and exhaust temps.
__________________
Confusion is offline   Reply With Quote
Old 04-25-2012, 03:00 PM   #4
Senior Member
 
wb7auk's Avatar
 
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
The answer is 4 degrees
__________________
Art
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
wb7auk is offline   Reply With Quote
Old 04-26-2012, 01:23 AM   #5
Senior Member
 
Join Date: Nov 2009
Posts: 500
If it is carburated check the throttle shaft for wear. This is the shaft that runs thru the front venturies. Mine was worn and the throttle would hang to far open and would diesel when the key was turned off. New bushings were installed in the carb when I had it rebuilt.
Before my carb was fixed I would shut the key off before putting the transmission in Park. This eleminated the dieseling most of the time.
__________________
leadman is offline   Reply With Quote
Old 04-26-2012, 08:04 AM   #6
Junior Member
 
Join Date: Mar 2012
Posts: 22
The timing

Thank you all for your help.
Dan
__________________
Daniel6001 is offline   Reply With Quote
Old 04-26-2012, 07:11 PM   #7
Senior Member
 
Senior Chief's Avatar


 
Vintage RV Owners Club
Fleetwood Owners Club
Join Date: Jun 2009
Location: Somewhere in the woods in Belfair, WA, WA
Posts: 1,250
Just to be clear, is your Winnie a 1990 or a 1991? Generally the chassis on an RV is from the year previous to the year of the RV build, so if you have a 1990 Winnie, you have a 1989 454 engine.
__________________

__________________
Life rocks when your house rolls
Senior Chief
& the Cheese Queen


Senior Chief is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:20 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.