killacam661

i have a 93 civic dx with a sohc vtec turbo motor in it right now.... so heres what i need help with guys.

The car itself has a map sensor on the firewall,
i am using a engine harness with a map sensor on it as well.BUT THERE IS NO CHECK ENGINE LIGHT. but the car doesnt stay at a constant idle... i let it warm up until the fan kicked on but it keeps revving up from 1k up to about 2200k RPMS.

1. will i need a different engine harness?
2. thanks guys

killacam661

ttt

civicjoe

mmh how's the iacv?

gsxr1k05

92-95 civic did not come with a map sensor on the firewall. that was the 87-91 civic/crx. your map sensor unless aftermarket should be on the top of the throttle body unless your using an aftermarket throttle body like skunk2 (which it is mounted on the bottom). i would remove and clean out the iacv as killacam661 suggested. look in the FAQ for the DIY on how to do this. also, you can get a spray bottle with water and at 3-4k RPM spray water into the intake and steam clean the carbon out of the engine. i'd also dump in some BG44K. yes its 20 bucks for the can, but it also is the same **** the dealer uses when you get your injectors cleaned. im not saything that the injectors are a proble, but nothing wrong with cleaning them out along with the intake and throttle if its been a while.

Mr. Em1

iTrader: (1)

actually some eg's did have the map senor on the wall. check your voltage on ur tps and take a look at you idle air control valve it may be dirty. if not check you grounds. what obd is your throttlebody? does it have the map onto of the throttlebody?

gsxr1k05

i didnt know that. learned something new. thanks em1

Mr. Em1

iTrader: (1)

but you are correct mostegs have the maps on the throttlebody, until i stripped one down and it was just like the 88-91 civics

killacam661

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr. Em1 &raquo;</TD></TR><TR><TD CLASS="quote">actually some eg's did have the map senor on the wall. check your voltage on ur tps and take a look at you idle air control valve it may be dirty. if not check you grounds. what obd is your throttlebody? does it have the map onto of the throttlebody?</TD></TR></TABLE>

yes there a map sensor on the throttle body. and one on the firewall as well.its a obd1 throttle body.

jdmcivicracer89

you could also have a vacuum leak...

BryanM.

iTrader: (1)

Some DX's have a firewall mounted MAP and it's wiring coming through the fire wall as well. Try connecting the MAP wiring coming through the firewall to the throttle body mounted MAP.