Hello Guys
as the title says, my car suffers from temporary loss of power when accelerating.
The issue existed already when I got the car. I swapped the totally clogged up air filter for a new one and cleaned the air temperature sensor. This solved it for more than a year and about 6000km. The engine did not miss a beat. Made factory power figures on the dyno.
Its a 92 manual coupe. Has seen about 235tkm of road in its whole life. Engine is totally stock beside exhaust.
After driving the car for two weeks daily and about 850km the issue started again past friday on my trip home. During the two weeks I had a CEL 3 times. Checked the codes, both oxygen sensors. Not surprising as the sensors are 24 years and 230tkm old. I had experienced this temporary power loss with an old civic that had o2 sensor issues as well so I thought its probably related to it.
On the weekend I swapped the boat anchor headers for some topspeed ones and a set of highflow cats. Installed both new O2 sensors (Denso). Beside the fact that the Topspeed headers are the biggest peace of crap I have ever seen, the difference in power they make is instantly noticeable.
Sadly though, the issue got worse.
On half throttle acceleration, it runs fine.
little over half throttle it instantly pulls hard (harder than before with the boat anchors) but looses like 100hp after half a second. barely accelerates for 3 seconds and then power comes back to normal instantly.
spontaneous full throttle in first when rolling below 3000 rpm generates a hesitation before it starts to accelerate and do the same as at over half throttle.
When hitting vtec it pulls hard like it has never done before.
No CEL, checked for codes, none.
Engine runs smooth and seems to idle more constant than before.
Any ideas?
Thanks
Bernhard
as the title says, my car suffers from temporary loss of power when accelerating.
The issue existed already when I got the car. I swapped the totally clogged up air filter for a new one and cleaned the air temperature sensor. This solved it for more than a year and about 6000km. The engine did not miss a beat. Made factory power figures on the dyno.
Its a 92 manual coupe. Has seen about 235tkm of road in its whole life. Engine is totally stock beside exhaust.
After driving the car for two weeks daily and about 850km the issue started again past friday on my trip home. During the two weeks I had a CEL 3 times. Checked the codes, both oxygen sensors. Not surprising as the sensors are 24 years and 230tkm old. I had experienced this temporary power loss with an old civic that had o2 sensor issues as well so I thought its probably related to it.
On the weekend I swapped the boat anchor headers for some topspeed ones and a set of highflow cats. Installed both new O2 sensors (Denso). Beside the fact that the Topspeed headers are the biggest peace of crap I have ever seen, the difference in power they make is instantly noticeable.
Sadly though, the issue got worse.
On half throttle acceleration, it runs fine.
little over half throttle it instantly pulls hard (harder than before with the boat anchors) but looses like 100hp after half a second. barely accelerates for 3 seconds and then power comes back to normal instantly.
spontaneous full throttle in first when rolling below 3000 rpm generates a hesitation before it starts to accelerate and do the same as at over half throttle.
When hitting vtec it pulls hard like it has never done before.
No CEL, checked for codes, none.
Engine runs smooth and seems to idle more constant than before.
Any ideas?
Thanks
Bernhard
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