b18c1 ek civic boggy around 2-3k rpm. help diagnose.
 

sorry if this is the wrong section.

1997 ek hatchback with a 99 gsr engine obd2 p72 ecu

Issue: very boggy and hesitant around 2-3k rpms

Replaced map sensor, fuel filter, and tps sensor, checked voltages to the 3 tps wires. Replaced spark plugs, distributor cap, wires, rotors, installed skunk 2 intake, 65mm TB.

-only CEL codes for evap emissions

-losing coolant, possibly burning. about 0.5-1.0L every 350k ish. weird thing is I pressure tested it about 2 weeks ago and the cooling system held the pressure.

how is your catalytic convertor?

boggy? sounds like its running rich! how does the exhaust smell? un burnt fuel?

Fuel try changing the ignition coil. Also check fuel pressure
Posted via RS Mobile

You don't just burn coolant without you noticing. There will be a smell, if you can't see it on the ground, then your headgasket is toast
Posted via RS Mobile

hook up a fuel pressure gauge.

first thing that came to mind too

do a compression test

yes

I see small amounts leak. I'm talking like a drip sometimes.

Good idea.

would a low compression test mean the head gasket is bad?

^ could mean rings, head gasket, or valves, but in ur case, if its low + the factor of loss of coolant, possibly head. just start with fuel pressure gauge, and coolant pressure tester again. leave it hooked up over night if u have to at rad cap pressure. also check ur fuel lines for kinks and fuel system for rust holes setting off emissions code.


thats probably why ur low on coolant. if its coming from hose, replace it with new clamps. if its from under the timing cover area, water pump.

Take out your cat converter and rip around the block. See if it still hesitates. Might be a little loud though. :D

if only at 2-3k I don't think it's the cat. It's strong as usual past that range?

Take out the sparkplugs and look for one that's just simply very clean. You have coolant in that cylinder.