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Author
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Topic: Motor hesitation
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66bluefb
Gearhead Posts: 500
From: Okla.City,Okla.
Registered: May 2002
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posted 10-11-2002 08:23 PM
   
My motor has a hesitation for a split second when I let out the clutch. Its like it bogs down and then takes off. I have notice this problem for a few weeks. The motor is a rebuilt 86-302 HO with about 1000 miles on it since rebuilt. I have 66-289 heads with 160-194 valves and a chevy guy at work told me to set the plugs at . 045 when I first put it together,is that right? It also seems to be not as quick as it was. Here is my set up
86-302 HO bored . 030, crank . 010 under
66-289 heads ported, 3 angle valve job, 194-160 valves
Edelbrock RPM Performer, 625 carter
Duraspark ignition
B-303 cam, roller rockers
Thanks,Tony  Oklahoma 24 Texas 17  ------------------
http://ourworld.cs.com/blagintony/myhomepage/auto.html> [This message has been edited by 66bluefb (edited 10-11-2002).]
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Fastymz
Moderator Posts: 18590
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 10-11-2002 08:35 PM
Tony I just changed my 625 carter to well used 600 Holley VS that I rebuilt.I cant tell you enough how much that helped me out.
And for the plugs I run mine at no more then .035 gap.My guess would be the secondarys are coming on to soon.? SCOOP
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2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
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ewokeric
Gearhead Posts: 216
From: woodbridge, va united states
Registered: Mar 2002
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posted 10-12-2002 09:37 AM
i might be going the wrong way but i had a bogging problem in my 351w in my stang. I changed the pump shot of the accel pump on carb and adjusted the timming on mine and that seemed to take care of it. Also i gap my plugs at .035 as well. Don't know if that helps just my 2 cents
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66bluefb
Gearhead Posts: 500
From: Okla.City,Okla.
Registered: May 2002
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posted 10-13-2002 07:30 PM
Thanks Fastymc&Ewokeric for your reply.I set my spark plug gap at .035 about 4 of my plugs were loose, not real loose but they weren`t tight.My #1 plug was a little wet with gasoline. I don`t know what that means.I`ll see if gapping the plugs will make a difference when I start the car.I was putting in a 180 thermostat in my car and I have a new chrome housing that I bought from Summit and put it in a couple of months ago. It has a rubber o ring instead of gasket and the damn thing would not seal up again.Wasted a new gallon of antifreeze then went to parts store to buy a o ring and they don`t sell them.If it ain`t one thing its another.Took the housing off my 289 and going to take to work tomorrow and clean it and paint it.Maybe tomorrow night I will be able to see if it runs any better.Thanks,Tony------------------
http://ourworld.cs.com/blagintony/myhomepage/auto.html>
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Fastymz
Moderator Posts: 18590
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 10-13-2002 07:38 PM
Has you already know keep those plugs tight. 
The #1 plug was the only that was wet?What shape are your coil and plug wires in? Dose the car seem real rich at idle. I dont like those O-rings either.I do know a few guys that run them without any problems. SCOOP ------------------
2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
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66bluefb
Gearhead Posts: 500
From: Okla.City,Okla.
Registered: May 2002
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posted 10-13-2002 08:00 PM
My plug wires are new.My coil is a flame thrower and is a couple of years old.It seems to idle fine.Yes the #1 was the only one that was a little damp.[This message has been edited by 66bluefb (edited 10-13-2002).]
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Fastymz
Moderator Posts: 18590
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 10-14-2002 01:36 AM
When you get it up and running again.Check the timing,or do you know waht your running the timing at.
It still sounds like it's getting to much gas off the line.
Is your carb new?SCOOP ------------------
2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
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65Restomod.com
Journeyman Posts: 43
From: Spring, TX United States
Registered: Apr 2002
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posted 10-15-2002 11:15 PM
I have the same problem with mine. I think I think I am getting too much gas too soon which is causing the bog. I am currently replacing the power valves in the carb from 6.5 to 3.5's to see if that makes any difference. I am hoping that by switching to the 3.5 will make them come in a bit later. I am running a way rich right now, but I jetted it down a bit as well. I have always heard to keep going down on the jets until you are running lean, then go 2 jet sizes up. I will let you know if that works for me. Thanks,
Jeff------------------
http://65Restomod.com
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66bluefb
Gearhead Posts: 500
From: Okla.City,Okla.
Registered: May 2002
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posted 10-15-2002 11:33 PM
Thanks Jeff.My carb is only 2 years old and I run good gas in it.I just put a electric fuel pump on it when I put the 302 in it.I wonder if that might have screwed something up?I got it running again after resetting the plug gaps and it still bogs.What the hell I`LL just peel out every time. Tony
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Fastymz
Moderator Posts: 18590
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 10-16-2002 01:13 AM
quote:
Originally posted by 65Restomod.com:
I have the same problem with mine. I think I think I am getting too much gas too soon which is causing the bog. I am currently replacing the power valves in the carb from 6.5 to 3.5's to see if that makes any difference. I am hoping that by switching to the 3.5 will make them come in a bit later. I am running a way rich right now, but I jetted it down a bit as well. I have always heard to keep going down on the jets until you are running lean, then go 2 jet sizes up. I will let you know if that works for me. Thanks,
Jeff
Have you changed the vacuum secondary springs yet?
I'd start there 1st,go to the next heavery spring until the bog gose away. SCOOP
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2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
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