jawsiiv

93 Civic Si Manual.

Before rebuild engine decides to die. Loss of power and bogging, but no low idle

Find out that the head blew like 2 valves in 2 different cylinders.

Replace the entire engine, newer head.

Car now boggs and does not idle, it dies

Intake is from previous engine, and is it possible that the IACV went when I changed the engine and cleaned the IACV????

Thanks.

Also no CEL, good ECU.

-__-

same problem check my thread lol

Former User

Does the engine also rev poorly and misfire or is the problem solely with a low idle? Do you have a FITV on the throttle body? If so, clean it and the IACV.

jawsiiv

It does have a FITV, but does not misfire. It just rev horribly. I cleaned the FITV when I took the Intake off, and I cleaned the IACV. Could they possibly be bad? Also will a D15Z1 IACV fit on a D16B7 throttle Body?

Former User

Inspect the plugs, wires, cap, and rotor and check the ignition timing.

biggdogg

did you swap the map sensor and tps harness plugs. they will plug into each other.

jawsiiv

Naw I got them in the right one. I changed MAP nothing happened. I loosen the IDLE screw and it idles better, yet still there is a loss of power. Could it be a bent valve???

Former User

Check the ignition components and the ignition timing.

Here's the right way to adjust the idle speed:

jawsiiv

Tried that and the Idle is set correctly. I believe that I have blown the head gasket, because I am eating coolant, and it is overheating after driving it for awhile. although it is not smoking out the exhaust. I hope that changing the head gasket will do the job.