oem_em1

Hey everyone! I am feeling stuck at the moment and need some guidance.

Let me start off by saying that the car ran fine and idled fine before I started working on it (insert mechanic joke here).

I took a number of brackets and other pieces to have them powdercoated. Once everything was assembled the car started running rough. The rev's were bouncing. I assumed that this was because of air in coolant due to me removing a coolant line at one point. I flushed the coolant and made sure that the air was completely out. Afterwards, the car ran better but still not great. The rev bouncing was gone.

Then I read the codes and it threw P0108 (Map Sensor) and P0113(IAT Sensor). I threw on a map sensor from my Type R (same part #) and it still nothing. However, when disconnecting the plug from the map sensor the car does run better. Again, not great but better.

So what could it be? Any help is appreciated.

Other things to note:
1. New air filter
2. New OEM air hose (old was was cracked)
3. New spark plugs (gapped to OE spec)
4. New spark plug wires (wires are in appropriate sequence)
5. All grounds have been checked.
6. No coolant in oil and no oil in coolant.

0c00l

Have you checked for Vacuum leak?

oem_em1

mk378

Check for sensors not plugged in, or plugged in to the wrong place. You have to go by wire colors since the sensor plugs are not mechanically different.

Do not expect it to run right with any sensors unplugged and/or codes thrown. Resolve all that first.

hondamn1320

Make sure the MAP and IAT plugs are plugged into the right sensors. Also, if you powdercoated any brackets that are used for grounding, make sure the contact points are bare and not powdercoated.

Megalodong

+1 on this.

Other than that:
Before your work on it it ran fine.
After your work it runs rough.
Retrace your steps and figure out what went during assembly.

Did you remove or adjust distributor? Ignition timing correct?
Have you tried an ECU reset (idle learn)?
Remove and clean IACV and throttle body.
Do a smoke test.

oem_em1

Thank you! Will do.

Yes, I did make sure to check that as I had some troubles with one of the brackets that is attached to the trans. After resolving that, the power returned.

I did not touch the distributor with the exception of replacing the spark plug wires. After I clean the IAV and double check the plugs, I will reset the ECU. Thank you for the suggestions.

Freedo_Civegra

oem_em1

Megalodong

Great looking car.
A smoke test would have discovered that missing o-ring. I made a DIY smoke tester using with a paint can, two step (X-mas tree) connectors, two C-clips and corded rubber hosing. I attach it to my compressor and use a medium sized cheap cigar to create the smoke..works awesome.