Chasing a ghost in a 350 SBC. - Page 3 - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #31 (permalink)  
Old 01-21-2013, 06:38 PM
BOOMER SOONER
 
Last photo:
Join Date: Jun 2008
Location: Oklahoma
Age: 39
Posts: 243
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by cdminter59 View Post
That could be a possibility. They do take a long time to warm up. You don't have a spare Performer RPM you could try do you? Maybe a buddy might have one on the shelf? Have you checked your coil lately? Here is how to check it with an ohm meter. How to Test an Ignition Coil
I don't have a buddy with a spare Vortec RPM intake. And yes, I swapped out two different MSD Blaster 2 and Blaster 3 coils. Same effect. It's not in the ignition.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #32 (permalink)  
Old 01-21-2013, 06:43 PM
BOOMER SOONER
 
Last photo:
Join Date: Jun 2008
Location: Oklahoma
Age: 39
Posts: 243
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
I'm sorry. I didn't mean to sound like a turd. Your only trying to help! I swapped put every component of the ignition system twice. That's why is said "it's not in the ignition".
Reply With Quote Quick reply to this message
  #33 (permalink)  
Old 01-21-2013, 07:30 PM
Registered User
 
Join Date: Aug 2012
Posts: 12
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sounds just like the gremlin that I had last year. I thought it was ignition related and I upgraded everything with no luck. I would think at times it was fixed but then it would prove me wrong. I switched to an electric fuel pump and the problem was gone for good.
Reply With Quote Quick reply to this message
  #34 (permalink)  
Old 01-21-2013, 09:38 PM
Registered User
 
Last photo:
Join Date: Jan 2013
Posts: 168
Wiki Edits: 0

Thanks: 10
Thanked 35 Times in 32 Posts
This might sound out of line but I had a tach some years ago do what you are describing. It was intermittent miss fire at times then other times a miss that was consistent around 3k then disappear. I unhooked that tach and the problem went away for good. Just a thought.
Reply With Quote Quick reply to this message
  #35 (permalink)  
Old 01-22-2013, 05:38 AM
BOOMER SOONER
 
Last photo:
Join Date: Jun 2008
Location: Oklahoma
Age: 39
Posts: 243
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by steeny View Post
This might sound out of line but I had a tach some years ago do what you are describing. It was intermittent miss fire at times then other times a miss that was consistent around 3k then disappear. I unhooked that tach and the problem went away for good. Just a thought.
Hahahaha. Yeah, already tried unhooking the tach. No change.
Reply With Quote Quick reply to this message
  #36 (permalink)  
Old 01-22-2013, 05:40 AM
BOOMER SOONER
 
Last photo:
Join Date: Jun 2008
Location: Oklahoma
Age: 39
Posts: 243
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by abritton77 View Post
Sounds just like the gremlin that I had last year. I thought it was ignition related and I upgraded everything with no luck. I would think at times it was fixed but then it would prove me wrong. I switched to an electric fuel pump and the problem was gone for good.
Now the fuel pump has not been changed at all. It is a new Holley Big End 110 gph mechanical pump. I Have always used an electric pump until now. And I've been thinking of switching back to electric!
Reply With Quote Quick reply to this message
  #37 (permalink)  
Old 01-22-2013, 05:50 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by Hacksaw View Post
Then started playing with pump arm gap. Adjusted to have a slight gap in the pump arm and pump lever.
Just to be sure- the gap is only at WOT, not at rest (idle), right?

Quote:
Still a bit concerned with having 24 degrees initial, but there is zero pinging.
I'm guessing the cam is fairly 'healthy'. If that's the case, absolutely nothing wrong or unusual about the amount of initial timing.

BTW, good job on the carb tuning as well as the timing. A LOT of guys stumble (npi) on this.
Reply With Quote Quick reply to this message
  #38 (permalink)  
Old 01-22-2013, 07:59 AM
Registered User
 
Join Date: Jan 2011
Location: Hopewell, Va
Age: 62
Posts: 1,168
Wiki Edits: 0

Thanks: 0
Thanked 117 Times in 113 Posts
Chasing a ghost in a 350 SBC.

I read in one of your post about the trash you found in the 4150 carb. What type fuel filters are you using? Most manufacturers recommend a 100 micron filter at the tank. Also a 40 micron filter in the line up front. Another interesting thing I read the other day is not to use teflon tape on any gas or oil fittings. It said to use a paste type sealer with teflon in it. I used Permatex 59235 when rebuilding my engine last year. You have replaced everything in the ignition system and it hasn't fixed the problem yet. How about your fuel. Gas with 10% ethanol has a shelf life of about 3 months. The ethanol absorbs water from the atmosphere. I have heard of using a timing light to watch the gas as the carb squirts the gas. IDK but it is said you can see water in the gas. Here is the article (advertisement) i was reading. USA Fuel
Reply With Quote Quick reply to this message
  #39 (permalink)  
Old 01-22-2013, 05:20 PM
Registered User
 
Join Date: Aug 2012
Posts: 12
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I was using a summit racing summit racing 110 gph mechanical pump. I had installed it over the winter along with some other changes is why it took me so long to figure it out. I would swear that our description sounds just like my nightmare. It cost me a small fortune to figure it out.
Reply With Quote Quick reply to this message
  #40 (permalink)  
Old 01-22-2013, 05:53 PM
BOOMER SOONER
 
Last photo:
Join Date: Jun 2008
Location: Oklahoma
Age: 39
Posts: 243
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by abritton77 View Post
I was using a summit racing summit racing 110 gph mechanical pump. I had installed it over the winter along with some other changes is why it took me so long to figure it out. I would swear that our description sounds just like my nightmare. It cost me a small fortune to figure it out.
This Holley Big End pump was purchased off eBay. I'm sure its a knock off just like the summet pumps are
Reply With Quote Quick reply to this message
  #41 (permalink)  
Old 01-22-2013, 07:28 PM
Registered User
 
Join Date: Jan 2011
Location: Hopewell, Va
Age: 62
Posts: 1,168
Wiki Edits: 0

Thanks: 0
Thanked 117 Times in 113 Posts
Chasing a ghost in a 350 SBC.

Yeah, I think that pump might be suspect too. Probably losing volume as rpms increase. Try your electric pump maybe it will be the fix. Hope it works for you.
Reply With Quote Quick reply to this message
  #42 (permalink)  
Old 01-23-2013, 03:47 PM
BOOMER SOONER
 
Last photo:
Join Date: Jun 2008
Location: Oklahoma
Age: 39
Posts: 243
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Drove the car again today to work. 32 degrees this morning. Ran decent but the slight hesitation was back at part throttle. Now it's 60 degrees and the car is running awesome. Seriously thinking the RPM Air Gap isn't for cold weather! I hate to buy a RPM Vortec intake just to try. But I don't know of any to borrow. My heads are the Edelbrock E-Tech 170 so...
Reply With Quote Quick reply to this message
  #43 (permalink)  
Old 01-23-2013, 03:51 PM
Registered User
 
Last photo:
Join Date: Jan 2013
Posts: 168
Wiki Edits: 0

Thanks: 10
Thanked 35 Times in 32 Posts
Beginning to sound like poor fuel atomization in the intake and ports leading to a lean misfire. Does this engine ever get to operating temp when it is cool outside?
Reply With Quote Quick reply to this message
  #44 (permalink)  
Old 01-23-2013, 04:00 PM
BOOMER SOONER
 
Last photo:
Join Date: Jun 2008
Location: Oklahoma
Age: 39
Posts: 243
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
When it's cold, it runs between 170-180 degrees. When it's warmer it's running around 190. There is a 180 thermo installed. It does seem like it runs much better around the 190 range
Reply With Quote Quick reply to this message
  #45 (permalink)  
Old 01-23-2013, 04:03 PM
BOOMER SOONER
 
Last photo:
Join Date: Jun 2008
Location: Oklahoma
Age: 39
Posts: 243
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
I don't know if it mattered or not, but it is a late model roller Vortec block with one piece pan and rear main. Those engines use a 195 degree thermo I believe. But due to the carb intake I figured thermostat shouldn't matter? Would the combo of thermostat and spark plug heat have any affect?
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
GoPro video, Bucket-T chasing down a motorcycle deckofficer Hotrodders' Lounge 48 05-14-2011 08:39 AM
chasing pinholes. it worked...and didnt glhx Body - Exterior 10 10-28-2010 05:34 AM
Chasing down a really annoying squealing belt! killerformula General Rodding Tech 8 02-23-2010 11:31 PM
Chasing TPI Gremlins trees Engine 3 10-17-2005 11:05 AM
Cruising or chasing sales? tm454 Hotrodders' Lounge 3 08-30-2003 07:30 PM


All times are GMT -6. The time now is 09:22 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.