Well, the 305 LG4 w/700r4 is cruising at 45ish mph, light throttle, and, as I try to maintain speed, it loses a few (2) hundred rpm every 3 or 4 seconds, and lasts for about a second, and repeats continuously, and yes it loses the power of those rpm too. I want to know where to look first. On a wild guess, I'd say the lockup torque converter is engaging and disengaging, combined with some carb problem causing loss of vacuum or something to make it lose power and disengage. Or could it be some internal carb leaking spurts of fuel, or losing fuel flow.
Any ideas??
BTW, it has only been driven a couple of times a month lately. Can this do anything? Also likes to bog a little when goosed (small goose even) at lower rpms. Don't know exactly what's up there, prolly just needs a carb rebuild, or a rebuilt 400 eh!

Thanks
Jeremy

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86 Z28
LG4 rebuilt, yet tired again
700R4 (father just broke it)
Have 400 short block waiting for a rebuild still planning it out
Edelbrock catback

 

this happened to me last spring, I waited like three weeks to fix it, and by then the tach was bouncing all over, turns out the spark plug wires (one or two) were fried and the plugs were old. sounds like you have a bad plug, even if the plugs are still good you really don't lose anything by replacing them.

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late model 91 rs, fully loaded, auto, t-tops, red leather, paint- gm red and yellow blend (light red), custom painted 16" Camaro rims
305 tbi flat base 14"x3" with K&N, hypertech chip, accel super stock plug wires, only use full synthetic oil and delco filter, 2 1/2" cat delete pipe, Edelbrock 3" cat-back
MTX sub and amp, Bose all around
vic_v8@yahoo.com
street kills: New v-6 stang, 96 v6 camaro, totally killed '86 SC Camaro (305), 91 z 28 with 305
15.854@87.57 (I think I could have it 15.5 with good tires and two more runs)
next month: rest of ultimate tbi

 

hmmm, doubt it's the plugs, they're only a few months old, but the wires it could be. Come to think of it, I think something similar happened years ago, and it was a wire. This time though, the power drop is not as severe, but that could just be because I'm not on highways like before.
I'll check it out.
Thanks

 

Well thats all I could think about, I don't know that much about fuel delivery yet.

 

I would suspect the TC lockup. If it were a wire then you would have the same problem at idle as well.

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"Rice burners are like tampons...Every pu$$y has to have one"
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite