on the daily driver chevelle that i just spent the last 6 days in the garage working on im having a problem... set up is 1976 350 with a edelbrock 600, torker 2 intake, stock cam, and h.e.i. i just put a th400 in it and now its running like shit. i messed with the timming a little and im still getting the same problem. my brain is fried on this car and i just need some one to steer me in the right direction. im getting a low rpm pop out the carb and when i sit at a light it loads up and stalls. im getting even less power on the low end then before with this damn single plan intake. the plugs and wires are all new as well as the rest of the junk. any help would be great. im at my wits end with this car Bryan
what torque converter did it have before, and what does it have now? If you dropped the stall speed, this is what would happen.
no idea stall speed. the converter is a stock th400 out of a 88 chevy truck with a tow package. trans was stamped h.d (heavy duty?) And the other converter is what ever came in a 76 camaro. I asume since thats what the motor came from, and im sure the trans came with it. its all stock stuff.
Is it just since you put in the tranny? Or since you swapped out the carb and intake and HEI too? Always pays to make one change at a time, get that working, then change something else. When you swap a bunch of things you don't always know where you went wrong or where to look first. How does it run when it's in neutral?
Check your float levels, carter and edelbrock are known for float level problems. Sounds like the problem to me levels to high.
the carb intake and h.e.i have been on it since augest. i just did the trans swap. it runs fine in park and nuetral. i allso tried leaning it out thru the carb and its still loading up in gear.
Sounds like the stall of the new converter is too low. If the converter is engaging at whatever your idle speed is set for it will drag the motor down and make it load up. Also, check for vacuum leaks. Look down the carb at an idle when in gear, is fuel dumping out the venturis? May be a bad or incorrect power valve. Could be the single plane manifold, on a stock or near stock engine they give crappy idles.
im preety sure it has eevry thing to do with the converter since this thing was running great when i dove it into the garage to change out the tired old turbo 350. so i find it hard to belive that in the 6 days the cars been off the road that the carb fucked up on me. i really dont want to pull this damn trans out again so i may just have to make some adjustments to make it work good enough for now. i knew i shoulda put that vega converter in damnit!!!
I don't know shit about Chevy trannies, but is it a lockup type converter that isn't locking up? I know it should only affect the car while it's rolling, but... Also, didya miss a vacuum line? It's usually the obvious stuff that bites the hardest. Did Greg leave a Black Label can in the bellhousing? Good Luck! Shoulda came and got the 700R4! Jay
yea the 700r4 that no one knows any thing about least i know what i got with this tranny. i got 63,544 miles from a old dpw truck onley 30 miles off of what the new speedo says. isnt that special. well i put the mufflers on her ands too it around the block after some more tunning of the carb. and no i didnt miss any vacum lines theres onley the one into the vacum modual. and the trans does not have a lock up. but any way she isnt loading up any more. but still slow as a dog untill it starts to tach up a bit. i think a diffrent converter is in order least that what fathack suggest over the phone. and that lazy ass didnt leave any thing around the car haha he didnt want to help work on it something about being old and not wanting to bend over i dunno but i think i got her running good enough untill i feel like putting a converter in it. does any one have any suggestions on a converter. like one from a junk yard. brand new stuff cost to much and the car will be getting sold in spring maybe.
Not for nothing but just for HAHAs check your distributor cap. It may have cracked against the firewall if your engine leaned back while you had the tranny out & the rear of the engine was unsupported. I know this can happen because I did it myself once. Billy
man good call on that one.. i didnt think about that. that could be the cause of the pop(misfire) at low rpm...
maybe try checking the modulator on the tranny,if it's shot it will be full of tranny fluid,could also cause a vacuum leak too.you probably allready know this but turbo 400's have the electric kickdown,and 350's don't,a pretty nice feature if you ask me!i heard somewhere once that you can tell what type of torque converter you have by the lines on it,not really sure if it's true or not maybe someone knows!?
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