Nfire247

Hey guys, im new to honda-tech, and somewhat new to hondas in general, but i have a problem. About a month ago i bought a 1997 civic dx 2dr with a B16a swap out of a 1994(i think) SIR. The engine cranks, runs, idles at about 1K, and i drive it daily, but something is definatly wrong. My CEL is on, i get about 20MPG and no vtec. Unfortunatly i didnt do the swap, and dont have the knowlege to re-do it. the CEL code is for the map sensor, which has already been replaced. I really hope that this is an easy fix. Any help would be great.

5_Lug_B

Try splicing a new plug on it and reset the ECU.
A MAP Sensor will definetely cause a Honda to run crappy.

Nfire247

cool, i'll try that. anyone else got an idea?

Nfire247

soooo, i was told by a local mechanic that it was a map code for the CEL, but i just checked it, and it is also throwing a TPS code. Could this be the problem?

sohctodohc

sounds like the tps sensor and the map sensor are plugged in wrong take the sensors unplug them and then take the one that is plugged into the map and plug it into the tps and vice versa

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sohctodohc &raquo;</TD></TR><TR><TD CLASS="quote">sounds like the tps sensor and the map sensor are plugged in wrong take the sensors unplug them and then take the one that is plugged into the map and plug it into the tps and vice versa </TD></TR></TABLE>

In simple terms, switch the TPS and MAP sensor plugs.

Nfire247

i did that the other day just to see (be4 i knew about the second CEL) and it ran horribly, so i think that they are probably right.

devney

maybe the sensors are bad

gsrhatch2356

unfortunally hondas dont have mass air flows so in order to determine air coming in it relys on map sensor to determine pressure, tps to determine load, and intake air temp cause temp also reflects pressure. so you would get horrible gas mileage if you are thrownig codes for them first the map and tps are 5volt refrence sensors which have 3 wires 1. constant 5volts 2. Ground 3. sensor signal so start with makeing sure you got 5 volts on one of the 3 wires then check for voltage on the ground side if you see voltage its got a bad ground. then on the signal wire watch voltage go up and down smoothly as you either move the throttle blade or cause pressure to go up and down, depending on what sensor you are looking at start with that you should come up with somtheing.

Nfire247

ill give it a shot, thanks, any other ideas?

R Benefits

check the vacuum lines on the back of the intake manifold.

Nfire247

so i know that you cant buy a TPS at a honda dealership, or autozone, but i bought one on ebay without thinking about how im gonna install it. Anyone got any thoughts?

eg6sirll

you must clock the tps. either eyeball to where the old one was, or hook up a dmm and adjust until you get the correct voltage i cant remember what it is at idle but you get the idea.

Nfire247

well i installed my new TPS, and i still have a check engine light, but only for my MAP sensor, the TPS code is off now, so i guess im going to assume that the mechanic did not change the map like he told me he did, because he didnt charge me, and buy anouther one to see if that fixes my problem, sound resonable?