hatchbackkid82

Recently installed an Omnipower TB on my 91 Integra. I'm having serious idle issues now. The car idles steadily at 2K RPM now and the CEL is on. I replaced the MAP sensor with one from a 94 Integra, the one on my car was mounted on the firewall, so i had to extend the wires to the new MAP sensor since it's TB mounted. I tried adjusting the idle screw and nothing. I also replaced the TPS as well. When I got to adjust the TPS it either idles higher or stays the same. The car is throwing a Code 7, Throttle position sensor.

The car drives fine, it just idles high. It stays steady at 2K RPM and doesn't come back down.

Has anyone else had this problem? Any ideas what else it could be? I'm stumped and frustrated. The car ran fine prior to the TB install.



Thanks for the help.

wunfstgsr

You need to calibrate the TPS correctly.

Also check to see if you have to much tension on the throttle cable.

One way is to turn the throttle wheel where you attach the cable manually with your hand and close the throttle plate with pressure as if it was stuck open slightly and see if the idle drops, if it does theres a small adjusting screw behind the wheel and adjust the nut so the throttle plate can close better. sometimes the screw is to high and doesn't allow the throttle plate to shut completely causing a high idle. then adjust the cable again so theres good slack.

hatchbackkid82

I saw that but didn't bother checking it out. I'll give it a shot tomorrow. Would that still cause the CEL to come on? There seems to be a decent amount of slack on the throttle cable as well.

tamboo

double check tps.
ebay brand x and blox were both bad out of the box for me.
finally bought a dorman ftw.

https://honda-tech.com/honda-crx-ef-...hread-2830131/

wunfstgsr

Your cell is from the TPS sensor. double check you diddnt switch the map sensor plug with the TPS plug they have the same male plug, iv seen it happen.

hatchbackkid82

So was able to work on the car a little yesterday. Turns out I had a leak at the throttle body gasket. Tightened it down and the CEL went away and the idle dropped from 2K rpm to 1500 rpm, also tried calibrate the TPS. But I could not for the life of me get get it to be with in range, even the slightest movement would throw it off. Are they really that sensitive?

Thanks guys for your patience. Was a Honda guy over 10 years ago, VW's and Toyota's was what I was familiar with, getting back into Hondas after dealing with older VW's (pain in *** cars).

Also, I got a lot of heat from other forums about the TB being too big and not being port matched or having the supporting mods. I do plan to port match the IM, but still on the fence on which route to go. Stock IM port matched, Skunk2 port matched, or Blox Port matched. Which have shown the best results? And also plan on building the head in the next few months with some more aggressive cams, BC 404's. Would that TB still be too big with those cams?

Thanks again guys for all the help

tamboo

use bolts so you can tighten down that tps good and solid so it wont budge.
screws dont cut it imho, cant get enough torque on em.

wunfstgsr

Good tip! usually a good T.B like the Sk2 ones come with bolts and a new gasket for the TPS. Its very sensitive, once you have it at the right setting usually when you go to torque the small bolts down it will move slightly bring the sensor out of spec, i actually compensated the numbers cause once i torqued the bolts it would jump up a few so it took a few mins of playing with it till i got it to be within spec.

wunfstgsr

what manifold do you have?

Are you going to keep the motor N.A or will boost it?

if your throttle body is bigger than the inlet of the manifold for example you have a 70mm T.B on a stock manifold which usually are 64mm you actually loose power because of the step, its why you need to port match the manifold or theres no real gains from the throttle upgrade.

I would steer away from Blox manifold its just my opinion and look into the Sk2 manifolds, best bang for your buck is the skunk2 ultra street manifold! the design is proven go on there web sight they have dyno comparisons, and i love this manifold on my motor as well. They leave the velocity stacks unported so you have the option to port and polish the manifold.

hatchbackkid82

Car is a 91 Integra with a B18A1 in it. Currently has basic bolt ons, I/H/E. I have the stock manifold on there right now.
I was goint to keep it NA, nothing too crazy. Shooting for a little over 150WHP.

I was looking at PR-3 Pistons, with BC 404's. Valve springs would be upgraded, I'd be using the stock valves. I've heard Skunk2 was the best option, didn't know if people had similar results by porting their stock IM.

wunfstgsr

Not to deter you but If your going to go do all that with pistons ect, i would just put a simple turbo kit on, you probably will not be satisfied with the power after dumping all that money! put a turbo kit on and you get more power, it will be much more easier than pulling that motor apart doing pistons ect.. keep it at 6 psi and have fun. You will make 150whp hp N.A but after spending allot of money and time.

Another option is to do a LSvtec conversion. Swap a Vtec head on and do some work to the head like a ported head, ported manifold, cams and a good 3'' cold air intake you will make around 200hp with a good setup like this.