Hey guys, my engine light has been on since I swapped in a stock b16a2 motor (kept the turbo bolted on)... I suspected that it would be my map sensor because I didn't have the missing link attached, and I'm using the stock map sensor. The ECU told me it was code 3, which somewhere on this forum is a chart that says 3 = map sensor.

I added the missing link, reset the ecu and the engine light is still on. I swapped the map sensor out with another one of the same, reset the ecu and engine light is still on... oh, and I have the P72 GSR ECU if that matters... running the b16 not tuned... I know...

My method of reseting the ecu was to disconnect the +battery for about 15min then reconnect...

any idea's on where to look next? or maybe someone knows the answer?

Thanks for any help...


Modified by turbosi03 at 12:21 AM 1/22/2004

 

If it is coding up as soon as you turn the key on it has a wiring problem or a sensor failure. Instead of throwing new parts at the car it should be diagnosed using a factory service manual or helms manual. It could be wired wrong, could be a bad sensor, could be a lot of things.

 

maybe you didn't reset the ecu correctly. For my civic, from the fuse box I pulled out the 7.5A fuse. Or if yours is a different number, it's the backup radio fuse.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicshowracing65 &raquo;</TD></TR><TR><TD CLASS="quote">maybe you didn't reset the ecu correctly. For my civic, from the fuse box I pulled out the 7.5A fuse. Or if yours is a different number, it's the backup radio fuse.</TD></TR></TABLE>

You dont have to take the fuse out to reset it. You can just disconnect your batter for like a min and it works.

btw, the ecu fuse is 15A, top left corner under the hood.

I also agree that it might be wired wrong or you may have the map sensor and IAT hooked up backwards. But then again, it would run like total ***.

 

I'd say he connected something wrong, or something ain't connected.
I had CEL when I forgot to connect temp. sensor on air intake... may be something similar...

 

Hey my car does this too. Right when i turn the key the cel comes right on. So you guys are saying it could be wiring or map issues.

 

My car did that too, i took out the lightbulb behind the dash..fixed the problem in no time

 

ok thats cool, I know I'm not alone... Thanks for the info guys, I'll check my temp sensor, and go through the helms manual on map sensor wiring...

 

i had that problem too. my missing link was broken or something...is that possible??? anyways when u get that CEL does it put ur car into LIMP mode right away? it did to me, so i fixed it by getting hondata!

 

ha got it! a dumb one too... I went through the helms to check the map sensor which was fine... then went to check the IAT sensor (wish I did first) and it freakin wasn't there! I just have the piping from the intercooler with no sensor to plug the connector into.

I put a 20kohm resistor across the IAT connector pins to simulate 32 degrees (F), reset the ecu, and the engine light goes off... should I drive like that, or am I better off with the engine light on?