OK, I am not a noob I have an Associates Degree in Automotive Technology, with a Honda emphasis, and 2 years experience as a Honda Tech.

With that being said I HAVE NOT, ...HAVE NOT tried to diagnose this problem yet, because of the shitty weather here in NEPA, I will be taking the car to the shop to get it ready for spring here soon. I simply am looking for a starting point or to see if any one else has had this problem.

The ISSUE:
When I start the car I HAVE to have my foot on the throttle, or it will simply just crank.

Once started I HAVE to keep my foot on the throttle to keep it running, Unless...

I push the throttle to WOT... for just a second....

it dosent matter if it is fully warm or not.. it still does it..


After that the car idles perfect...

It seems as though the TPS is sticking but idk I have never seen this before. As stated in the title it is tuned on Hondata S300, idk if it has anything to do with it.

Info on the Car. its a 94 DX w. a turbo b18c:

Motor/Turbo setup:
-B18c1 block
-81mm CP 9:1 pistons
-Eagle rods
-ACL bearing
-ITR crank
-Stock ITR head
-ITR intake manifold
-Nuekin ramhorn manifold
-T1 Development 3" DP modified by Synapse Motorsport
-GT3076R .63ar
-PTE 880cc injectors
-Hondata S300
-Straight 3" SS exhaust
-Tial 44mm wastegate(10psi spring)
-Tial Q BOV
-2.5" Synapse Motorsport charge piping powdercoated black
-Full Race (PWR) 475hp IC
-Hallman Pro Rx MBC
-Full Race vacuum distribution block
-Hasport Motor Mounts w/ 88A inserts
-Avid billet front torque mounts

Fuel Setup:
-8an feed and 6an return lines running from a new stock fuel tank to engine bay
-Walbro Inline 190lph
-Walbro Intank 255lph
-Summit inline fuel filter
-BDL Fuel Rail
-Aeromotive A1000 Fuel Pressure Regulator

 

Sounds like a dirty, misadjusted, or blocked off FITV.

 

The ITR does not have an FITV. Try clocking your tps to .5V at idle and 4.5 at WOT. I had the same problem (tps sticking).

 

If there's no FITV, then try testing and cleaning the IACV. Another possibility is that someone tried to adjust the throttle stop screw, which should not be done.

 

The DFW Screw lol

 

Thats what i had assumed.

I have tried to do this before on a different vehicle...

althought you will not find too many "Honda Techs" doning this as they would just replace the part. Most likley a whole TB.

...But i have never seemed to get it perfect.

consitering getting a whole new tb set up if i have to do that..

 

DFW?

Dont Fu ck With??

LOL

 

If the TPS reads approximately 0.5V at closed throttle, then the problem almost surely lies elsewhere. I also think a malfunctioning TPS is unlikely given that the warm engine idle speed is fine. The latter idea would also suggest that the throttle stop screw has not been messed with. I would focus on the IACV and the idle speed adjustment.

 

the warm idle speed is not fine.. it dosent matter if it is fully warm or not.. it still does it..

 

I missed that. What the TPS output voltage at closed throttle?

 

yessir lol

 

Im not sure.. as i stated in the op i have not even attempted to diag this yet.. but now i believe this is where i should start..

 

Thats funny....

 

I can print out a how to on All Data for you. It's not hard. All you need is a DVOM.

 

No no.. i know the procedure.
KOEO
at closed throttle check for .5 volts at the red/blue wire..
at WOT check for .45 volts..
if they are off, loosen the bolts, clock tps until you get the right readings..