I can't drive 25! Help!
Thread Starter
|
Junior User
Joined: May 2001
Posts: 97
Likes: 0
From: Modesto USA!
I can't drive 25! Help!
My ’69 has a 2v 390 with about 300 miles on it. Everything under the hood was either rebuilt or replaced. It’s all stock except the “RV” cam.
After I got it in and tuned it ran great for a couple hundred miles. Suddenly, I mean at a stop sign, it started to miss. Well its been a month and a half of fiddling and the miss won’t go away, it might run overall a little better or a little worse but its still there.
It idles ok, it pulls good and runs good at 50+, it just won’t go 25. Actually no matter the RPM, even going 55, when I let up on the throttle so is just barely open it begins to miss. I have to either be accelerating or off it altogether or it acts like it has about 6 plug wire reversed.
Man I’m stumped, hep me!
After I got it in and tuned it ran great for a couple hundred miles. Suddenly, I mean at a stop sign, it started to miss. Well its been a month and a half of fiddling and the miss won’t go away, it might run overall a little better or a little worse but its still there.
It idles ok, it pulls good and runs good at 50+, it just won’t go 25. Actually no matter the RPM, even going 55, when I let up on the throttle so is just barely open it begins to miss. I have to either be accelerating or off it altogether or it acts like it has about 6 plug wire reversed.
Man I’m stumped, hep me!
Thread Starter
|
Junior User
Joined: May 2001
Posts: 97
Likes: 0
From: Modesto USA!
I can't drive 25! Help!
Barry, I don't. but I've had it off and apart twice and used 2 cans of cleaner on it! At first I thought it was an ignition problem cause it missed at all speeds and sometimes would not start. It starts now but doesn't really kick hard if you know what I mean. I would replace the carb but I want to put on a 4v and would like to make sure I don't have a more serious prob. first.
thanks
thanks
Senior User
Joined: Sep 2001
Posts: 118
Likes: 0
From: Bothell USA
I can't drive 25! Help!
[updated:LAST EDITED ON 09-Aug-02 AT 04:10 AM (EST)]Hello, when you took the carb off did you replavce the gasket? Maybe you have a vacume leak? Just a shot in the dark. Good Luck!
Logistics Pro
Joined: Feb 2000
Posts: 3,565
Likes: 9
From: Sun River St. George
I can't drive 25! Help!
I would go looking for a vacuum leak. I use starting fluid, which YOU SHOULD NOT USE, to find vacuum leaks. Others use propane, now that I'm old I think I will to. Just for fun, do a cold engine compression test. I'm thinking sticky valves, maybe?
William in Atlanta
William in Atlanta
Thread Starter
|
Junior User
Joined: May 2001
Posts: 97
Likes: 0
From: Modesto USA!
I can't drive 25! Help!
Thanks for the ideas!
I've tried timing from 0 - 15 btdc thinking that my balancer may be off. As you would guess, it ran every way from crappy to real crappy, but the miss never went away. It has good mech. and vacume advance.
I don't think its a vacume leak. Although initially I had to open the idle mixture screws WAY out to get it to run good, I've got 20lbs and steady vacume at idle.
I think I'll try the compression test this weekend cause I'm starting to think its in the valves too.
Thanks again.
Mike
I've tried timing from 0 - 15 btdc thinking that my balancer may be off. As you would guess, it ran every way from crappy to real crappy, but the miss never went away. It has good mech. and vacume advance.
I don't think its a vacume leak. Although initially I had to open the idle mixture screws WAY out to get it to run good, I've got 20lbs and steady vacume at idle.
I think I'll try the compression test this weekend cause I'm starting to think its in the valves too.
Thanks again.
Mike
Trending Topics
Thread Starter
|
Junior User
Joined: May 2001
Posts: 97
Likes: 0
From: Modesto USA!
I can't drive 25! Help!
Just thought I would revive this topic to let you all know what the problem turned out to be.
Resistor wire! One little bit of resistor wire was hidden between the firewall and the connector under the dash. I thought someone else had taken it all out!
The interesting thing was that when I tried to start it, I had no spark from the coil. If I disconnected, then reconnected the hot wire to the coil it would start right up, weird huh?
I won’t go into everything I tried but I was getting pretty frustrated.
Mike
Resistor wire! One little bit of resistor wire was hidden between the firewall and the connector under the dash. I thought someone else had taken it all out!
The interesting thing was that when I tried to start it, I had no spark from the coil. If I disconnected, then reconnected the hot wire to the coil it would start right up, weird huh?
I won’t go into everything I tried but I was getting pretty frustrated.
Mike
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Posting Guru
Joined: Apr 2000
Posts: 1,428
Likes: 3
From: Summit, NJ
I can't drive 25! Help!
I would check the wires. I had this happen on another car.. the wire kept loosening up. When it was loose, the car would barely accelerate.. it kind of ran like you described. As soon as I plugged it back in nice and solid, the car purred like a kitten. Might be worth re-plugging all your spark plug wires to make sure they are thoroughly plugged in. Just my two cents..
James Kern
1970 F250 4x4
James Kern
1970 F250 4x4
Thread Starter
|
Junior User
Joined: May 2001
Posts: 97
Likes: 0
From: Modesto USA!
I can't drive 25! Help!
Man, you don't know what I tried! Although I had replaced just about everything under the hood about 200 miles before, I wound up re-replacing the: coil, plugs, plug wires, distributor, then points again, rebuilt the rebuilt carb – twice, ignition switch, and on, and on.
Runs good now though!
Mike
Runs good now though!
Mike
