stumble at cruise speeds
Thread Starter
Registered User
Joined: Mar 2001
Posts: 27
From: Osgood, IN U.S.A.
stumble at cruise speeds
problem is with my 383 carbed 91. it has a full msd ignition system w' 6al box. the car idles great, but from around 2200-2800 it has a miss in it that seems to be getting worse. once you get past 2800 or so it revs perfect just like it should. i have had the carb apart twice and put new float bowl, jet block, and bottom plate gaskets in it. i have also had the distributor apart and have everything perfect inside it. has anyone else come across a problem like this?? any and all help would be greatly appreciated. thanks in advance.
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brandon
79 Z, 357, pro1 heads, victor jr.intake,
prostars, powerglide, 9" ford w/ 4.86 gear, etc...
best pass to date :10.16@132.72mph
91 rs stroked not sprayed
11.86@115 so far........
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brandon
79 Z, 357, pro1 heads, victor jr.intake,
prostars, powerglide, 9" ford w/ 4.86 gear, etc...
best pass to date :10.16@132.72mph
91 rs stroked not sprayed
11.86@115 so far........
Registered User
Joined: Apr 2002
Posts: 96
From: Lincoln, NE
My 307 Stroker in my Monte acts the exact same way, started doing it recently. Plugs and wires check OK, distributor and HEI OK, haven't checked carb yet but I haven't touched it in a while so nothing should be changed. Curious as to what it is too...
Edit: It only does it at cruising speeds on the highway. I would probably say 2000-3000 RPM at a constant speed. Speeding up or slowing down will make it stop "missing" and it will run smooth again until a constant speed is once again reached.
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| There is no replacement for displacement |
| Soon Future F-Body Owner !
[This message has been edited by MonteSS427 (edited August 18, 2002).]
Edit: It only does it at cruising speeds on the highway. I would probably say 2000-3000 RPM at a constant speed. Speeding up or slowing down will make it stop "missing" and it will run smooth again until a constant speed is once again reached.
------------------
| There is no replacement for displacement |
| Soon Future F-Body Owner !
[This message has been edited by MonteSS427 (edited August 18, 2002).]
Advanced Tech Moderator
Joined: Aug 2001
Posts: 2,262
From: Nashville
This question is more suited for a regular tech section. I will move this over to 3rd Gen Tech, Thanks!
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Ken Mook - 97' SS #2544
Advanced Tech Posting Guidelines
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Ken Mook - 97' SS #2544
Advanced Tech Posting Guidelines
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Thread Starter
Registered User
Joined: Mar 2001
Posts: 27
From: Osgood, IN U.S.A.
talked to a guy yesterday that told me to pull the chip on the msd box and try it. well i have a two step so ill pull it and hopefully find that to be the prob. if that doesnt work i have a buddies box to try and am gonna pull the coil off the other car.
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brandon
79 Z, 357, pro1 heads, victor jr.intake,
prostars, powerglide, 9" ford w/ 4.86 gear, etc...
best pass to date :10.16@132.72mph
91 rs stroked not sprayed
11.86@115 so far........
------------------
brandon
79 Z, 357, pro1 heads, victor jr.intake,
prostars, powerglide, 9" ford w/ 4.86 gear, etc...
best pass to date :10.16@132.72mph
91 rs stroked not sprayed
11.86@115 so far........
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