Cheelee21

I bought my honda about four months ago nd love it one of the only main problems is the Car will idle up the way to 2000 rpms some times nd it rarley idles at the regular 750 rpms thank god its a stick shift cuz it only does it on idle tha guy that sold it to me said it might be the throttle position switch, i dont really know how to make sure

whited

What's your question?

Cheelee21

I'm sorry my question was how do i see if it is for sure my throttle position switch my Blinking Led Light says Code 7 Which should be it which i just figured out(Which Honda told me it would cost 80 bucks to test my Blinking light)So Am i right? or could it still be my air flow censor or something else

whited

What engine do you have? Stock?

TheRealMrHonda

Since you have an idle problem and a TPS code, I would check the TPS sensor. It's not hard but the best way to check it would be with a digital storage oscilloscope which most people don't have. Instead of the dealer I would recommend finding a good independent repair shop, preferably one that specializes in Hondas.

whited

I can't really tell with his post. The lack of punctuation definitely is confusing. I didn't get that he had a code, but wanted to check for the code.

jskol

In my 90 si the tps is just a variable resistor. If this is the setup on your 88 you can test it with a $10 multimeter and the info here; https://honda-tech.com/tech-misc-15/diy-calibrating-voltage-tps-2947986/ or here; https://honda-tech.com/honda-crx-ef-civic-1988-1991-3/official-honda-tps-wiring-calibration-thread-2830131/

TheRealMrHonda

I agree about the difficulty but my best guess is that he is saying he has 7 blinks from the ECU diagnostic LED.

TheRealMrHonda

Yes, it is basically a variable resistor (technically a poteniometer) and you can use a volt meter to make basic measurements. That may be all that is required in this case. However, if you are trying to find a "glitch" that only occurs for a brief range of movement in the sensor, using a DSO will make it easier to diagnose.

whited

I'd check the wiring before replacing the TPS

acmoc

I would clean everything down with seafoam deep creep first.