i have tried the archives and read back a few days and this is different than the other posts. Ok i put in a 5 speed about 2 weeks ago and since the idle has been hit and miss. If I bumped the throttle it "might" come down to 900 rpm, but mostly stays at 1500-1700 rpm. It sometimes would just go down to 900 if i stopped moving (pulled over). Ok so tonight i decide to check tps and IAC by the method in the tech section. WHAT I found is the TPS is on the money .54 idle and 4.35+/- at WOT. I have tried to do the IAC by the instructions, but as i disconnect it and start it it will race at 1750-2000 rpm. I have tried to back the screw up until it doesn't touch anything yet the idle stays at no less than 1700 rpm. ////no codes at all//// PLease I haven't a clue on this one. SHAGGY

------------------
'89 SHAGGY IROC
L98, W/C T5, all free stuff,T.E.S.,HOOKER CAT BACK,KYB,ACCEL8.8,JET fan sw. etc. 14.8@ 95.7MPH w/ auto, can't wait for the first T5 run.
so much to do , so little money

 

You will need to get into prom burning to take advantage of the T5. The chips are radically different from an AUTO to a Manual tranny. Only problme is that the Fbody didn't come with a 350/manual combo, so a heavily modified 305/manual combo chip.
Best thing to do is to join the DIY PROM board and start learning.


Brendan

------------------
1987 IROC-Z L98,SR,EB 6085's,LPE 219/219 SR Cam, Crane 1.6RR, EB TPI Base, 58mm TB, ADS 24#, AFPR, K&N, EB TES, Catco Cat, 3" Borla Cat-Back, Accel cap,rotor,distro/other crap, Aluminum DS, 94 Disk Rear, Adjustable Prop Valve, Precision 3.73 Gears, Weld in Sub-Frame Connectors, Hotchkis LCA's, KYB Shocks/Struts, Poly Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm, Big stereo, 730SD Conversion.

To see the ROC, Check out the webpage Here

 

Try removing the IAC and extending it (careful not to let it come apart) manually, then installing it again...leaving it unplugged from the electrical connector.

Clean it up while it's out.

Then try starting the car and see if the idle is lowered. If not suspect a large vacuum leak somewhere (check all the lines that may have gotten moved, etc during the tranny swap).

I don't think the drag on a TC would cause a 600-800 RPM drop at idle when compared to a flywheel, I'd think you should still be able to get it to idle okay??

 

No the chips aren't dramatically different. It should idle fine with the stock chip. I put T56 into my car that was originally an automatic and it runs fine.

------------------
1991 Z28 - 350 TPI, T56, McLeod street clutch, LT4 pressure plate, Pro 5.0 shifter, ported plenum & runners, AFPR, Hooker shorty headers w/o AIR, Flowmaster muffler, homeade ram-air, SSM subframe connectors, Kenny Brown STB, Global West steering box brace, Steve Spohn adjustable torque arm and T56 crossmember

 

Just thought I would ask.
Did you short the A and B diagnostics terminals with the key on, then wait 30 seconds before disconnecting the IAC connector?

 

Have you played with the MAF yet, in particular the relays?

------------------
"Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear."

-Thomas Jefferson

 

i had the same problem iin mine went to a 5 speed from auto and the 350 chip made the car run like crap i adjusted the iac even took it out extended it and still no fix i had an old ads 5 speed chp in 1 of my old computers put it in it runs fine but doesn't run the engine to it's capacity some guys have problems with the ecm after the swap some don't.borrow a 5 speed chip from someone before you spend the cash on a new one or equipment to bun your own

------------------
87 trans am 350 L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ads strip chip,relocated iat sensor,tb bypass,hollowed maf,a/c delete(whole lotta room in there now)

14.10@97mph w/2.01 60'

ed wright's fastchip saturday!!!!slp catback is finally on!!!
FLOWMASTER S.U.C.K.S