Hello all...I recently completed a 2.8-3.4 swap in an S-10, and I am
problems with the motor stalling when I put it into gear.
Here are the parts:
3.4L (from donor camaro, overhauled w/new rings & bearings, block
tanked/honed.) w/stock heads & valves; 1.52 roller rockers
Comp Cams High Energy 260H camshaft; 260 duration/440 lift. Timing
chain/gears to match.
Holley 0-8007 390CFM 4160 carb (Throttle plates drilled with 1/16
Edelbrock TorkerII tunnel intake
Stock HEI dist w/MSD 6AL box; overhauled & w/new ignition module
Holley "Red" electric fuel pump w/regulator set to 5.5PSI
Mated to a stock 700R4 tranny.
I am pulling 19.5in of vacuum @1500 rpm, rock solid. All vaccum lines
replaced with swap, and have gone over every line w/carb spray looking
Compression is great.
Ignition system functions perfectly.
I cannot get it to idle reliably lower than about 1200-1300 RPM; I
this is a result of the cam. It is happiest above 1400. It runs very
through the rest of the RPM ranges, although it does seem to be
happier without the vacuum advance being hooked up, while the choke is
Nothing major, just a very slight burbling. Mixture screws are 2 turns
I have drilled 1/16" holes in the throttle plates, it got quite a bit
happier after I did that. I've tried cracking the secondaries a bit,
while it will idle a bit faster, it doesn't seem to make it any
Still stalls when put into gear.
Any ideas what is going on here? I've run out, and getting very