Go Back   tbirdforum.com > Thunderbird Model Years > Flair Birds [1964-1966]

Flair Birds [1964-1966] You have a Fourth Generation Bird or just have some questions about them? Then this forum is for you, check it out.

Hard starting 390

This is a discussion on Hard starting 390 within the Flair Birds [1964-1966] forums, part of the Thunderbird Model Years category; After my 66 390 warms up it seems to crank to long to restart. Cold start it fires right up. ...

Reply
 
LinkBack Thread Tools
  #1 (permalink)   IP: 171.75.81.13
Old 01-25-2004, 05:02 PM
 
Join Date: Dec 2002
Location: NJ
Age: 67
Posts: 396
Rep Power: 51
boaterbob is on a distinguished road
Angry Hard starting 390

After my 66 390 warms up it seems to crank to long to restart. Cold start it fires right up. It's got a new carb and rebuilt engine. Could it be a coil problem?
Reply With Quote
  #2 (permalink)   IP: 68.18.89.207
Old 01-31-2004, 10:58 AM
 
Join Date: Jul 2003
Location: Louisville, KY, USA
Posts: 24
Rep Power: 0
64RREDCONV is on a distinguished road
My 64 does the same thing. I hope someone has some suggestions.
Reply With Quote
  #3 (permalink)   IP: 66.82.9.43
Old 01-31-2004, 03:39 PM
 
Join Date: Jul 2003
Location: New Roads, LA
Posts: 64
Rep Power: 18
Yoda is on a distinguished road
I was having some issues with that myself. I'll let you know if my new Ignitor II ignition and FlameThrower II coil fix things after I've driven for a few days.

I will say that prior to the upgrade, I would get an odd noise from the carb and some white smoke in the back if I accelerated hard at crusing speed. I think it was unburnt fuel. The new ignition parts seem to have completely fixed this and I have really nice acceleration at crusing speed now.
Reply With Quote
  #4 (permalink)   IP: 171.75.65.110
Old 01-31-2004, 03:47 PM
 
Join Date: Dec 2002
Location: NJ
Age: 67
Posts: 396
Rep Power: 51
boaterbob is on a distinguished road
I had the Petronix on already. I just added the Flame Thrower coil today. So we have the same test going. I'll look for your post.
Reply With Quote
  #5 (permalink)   IP: 209.240.205.60
Old 01-31-2004, 09:43 PM
 
Join Date: Apr 2002
Location: Daytona Beach Florida
Posts: 141
Rep Power: 27
t-bird-art is on a distinguished road
RE: Cold start OK Restart slow: Is the engine cranking slow or is it slow to fire up? Could be couple of things.A) Yes, a bad coil could have internal shorts and is overheating reducing output on re-start. Don't need fancy/pricey coils. Original correct Ford coils work correctly. Would not recommend High Intensity Coils (40K volts) they will burn hole in top of piston. B) Make sure the choke is fully open on re-start. C) On 1966 Bird make sure the Heat Riser ( mounted below passenger exhaust manifold) is rotating (opening and closing) easily. Test rotation when engine is COLD. D) Engine should crank at same speed and sound the same with hot or cold engine . If engine cranking speed is slow on hot engine , test Battery and starter and check Ignition timing . All three will result in slow engine cranking on hot engine.
E) On re-start, does engine TEMP read very hot. Ever had radiator boil over? On engine rebuild, did they pop the freeze plugs and flush the block?
Reply With Quote
  #6 (permalink)   IP: 209.240.205.60
Old 01-31-2004, 09:45 PM
 
Join Date: Apr 2002
Location: Daytona Beach Florida
Posts: 141
Rep Power: 27
t-bird-art is on a distinguished road
P.S. Have you driven 500 miles on the rebuilt engine?
Reply With Quote
  #7 (permalink)   IP: 66.82.9.19
Old 02-01-2004, 10:39 PM
 
Join Date: Jul 2003
Location: New Roads, LA
Posts: 64
Rep Power: 18
Yoda is on a distinguished road
So far I'm getting pretty quick restarts on a hot engine. Drove 45 miles tonight. Stopped for two errands a few minutes apart and only had to crank for a couple of seconds to restart.
Reply With Quote
  #8 (permalink)   IP: 209.240.205.60
Old 02-02-2004, 07:51 AM
 
Join Date: Apr 2002
Location: Daytona Beach Florida
Posts: 141
Rep Power: 27
t-bird-art is on a distinguished road
A warmed up engine firing/starting after a few seconds cranking is tolerable. But, your 390 can do better. When everything is right, you should be able to reach in the (open) window, turn the key, and it should fire up immediately. Now that's the Holy Grail. If you have driven 500 miles and used a local engine & carb rebuilder, I would re-visit them . Throw the challenge to them to dig in their bag of training, and experience to get it to fire immediately. They would be glad to do it.If rebuilders are not local, find a local mechanic with GREY hair still running his own 1-2 man shop. He's a gold mine of experience , especially, if he is a Ford man and/or former race car driver. With immediate starts ( of warmed-up engine ) you know the engine is running at peak efficiency and peak gas mileage and so does everyone else . You're at the fun part now !
Reply With Quote
  #9 (permalink)   IP: 171.75.65.124
Old 02-02-2004, 08:09 AM
 
Join Date: Dec 2002
Location: NJ
Age: 67
Posts: 396
Rep Power: 51
boaterbob is on a distinguished road
I live in NJ where it's been pretty cold. If you put your hand in the window after it's been off 3 or 4 minutes it fires right up. Only after it sits 15 minutes or so does it crank more the n it should. Changed the coil, Not the problem. I'm thinking i have to check and see if the electric choke is resetting. Glad to hear your running good Yoda.
Reply With Quote
  #10 (permalink)   IP: 68.17.96.58
Old 02-02-2004, 03:51 PM
 
Join Date: Jul 2003
Location: New Roads, LA
Posts: 64
Rep Power: 18
Yoda is on a distinguished road
Drove some more today and I should clarify my earlier post to say a couple of seconds at most. Made two quick stops today where it cranked back up immediately.
Reply With Quote
  #11 (permalink)   IP: 209.240.205.60
Old 02-02-2004, 08:12 PM
 
Join Date: Apr 2002
Location: Daytona Beach Florida
Posts: 141
Rep Power: 27
t-bird-art is on a distinguished road
Sounds like your engine is starting OK now. Maybe , don't mess with it and just drive it like you have been doing. These beasts must be driven regularily for best performance. Worst thing is to leave them sit.

Click for Port Orange, Florida Forecast
Daytona Beach Florida

Last edited by t-bird-art; 02-02-2004 at 08:17 PM.
Reply With Quote
  #12 (permalink)   IP: 152.163.252.136
Old 02-04-2004, 01:24 PM
 
Join Date: Feb 2001
Location: Keller, Texas, U.S.A.
Posts: 167
Rep Power: 30
tbird5866 is on a distinguished road
If you have hard starting on a warm engine after sitting 15 minutes or more, you may have fuel leaking from the carburetor into the intake manifold.
__________________
Fordman
Reply With Quote
  #13 (permalink)   IP: 171.75.81.103
Old 02-04-2004, 04:11 PM
 
Join Date: Dec 2002
Location: NJ
Age: 67
Posts: 396
Rep Power: 51
boaterbob is on a distinguished road
Okay I'll Check that. How about vapor locking, Is that possible?
Reply With Quote
  #14 (permalink)   IP: 209.240.205.60
Old 02-08-2004, 12:08 AM
 
Join Date: Apr 2002
Location: Daytona Beach Florida
Posts: 141
Rep Power: 27
t-bird-art is on a distinguished road
Vapor Lock is unlikely in Cold Winter. The Ford Carb on the 66 has a "Hot Idle Compensator" inside the carb designed to prevent vapor lock during Summer when it just gets too hot under the hood. Need correct gasket between carb & intake manifold . I have seen gas boil in the carb bowls because the insulating gasket was not right. FelPro Gaskets are right. After 15 minutes shut off, with engine OFF, look down the throat of the carb to see if it is wet ( with Gas) . Sometimes it is hard to see. A small strip of cardboard will soak up the Gas and you'll see a gas stain on the cardboard. ANY gas here means carb is leaking into Intake manifold. It should be dry as a bone.

Last edited by t-bird-art; 02-08-2004 at 12:11 AM.
Reply With Quote
  #15 (permalink)   IP: 68.192.174.1
Old 01-07-2005, 09:23 AM
 
Join Date: Dec 2002
Location: NJ
Age: 67
Posts: 396
Rep Power: 51
boaterbob is on a distinguished road
Quote:
Originally Posted by tbird5866
If you have hard starting on a warm engine after sitting 15 minutes or more, you may have fuel leaking from the carburetor into the intake manifold.
Kind of a late post, To my hard starting problem. I fixed this in the Summer. It was the secondaries leaking into the manifold. Took off the rear tank and found the float to be stuck. Thanks for the info Harley.
Reply With Quote
Reply


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

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
replacing head liner in port hole hard top 1212jamit Early Birds [1955-1957] 2 01-09-2012 11:10 PM
Starting problem MiMitch Twilight Birds (MN12) [1994-1997] 1 10-23-2005 10:12 AM
hard starting after 48 hrs stude3 Early Birds [1955-1957] 2 08-31-2004 08:36 AM
starting trouble 95tbirdv8lx Twilight Birds (MN12) [1994-1997] 0 07-13-2004 12:51 PM
water and cold starting s56 Early Birds [1955-1957] 7 12-01-2001 08:55 PM


All times are GMT -4. The time now is 07:05 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.3.0
Garage vBulletin Plugins by Drive Thru Online, Inc.