why does my accord randomly looses torque

2001 HONDA ACCORD
198,000 MILES
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STUPEDMONKY
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for some time now, if i am at any time driving my accord sometimes its fast, and some times its like boging a little, for example, if i am driving down the road, not applying to much gas and the car is driving perfict, then randomly it feels as if i just let go of the gas, the car hardly accelerateing.. now i rebuilt the engine about 15-20 thousand miles ago, and there is no check engine light. the only thing i can think of is a problem with my ignition coil/ module, any thoughts??
Nov 10, 2011 at 2:50 AM
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ASEMASTER6371
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sounds more like a partially clogged cat converter. i would have a shop do a back pressure test and snap throttle test to confirm.

Roy
Nov 10, 2011 at 2:56 AM
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STUPEDMONKY
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the car has a high flow 2.5'' exhaust with a high flow cat..
Nov 10, 2011 at 2:09 PM
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KHLOW2008
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Though the CEL might not be indicating, there could be trouble codes. Symptoms indicates a possible fault with the O2 sensor
which could be working but out of specs, so called a lazy O2 sensor. A scan tool would be able to tell you if it is within specs.
Nov 10, 2011 at 2:14 PM
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STUPEDMONKY
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good point.. is it possible to be the ignition? the distributor is the only thing i have not replaced and the car has just about 200k
Nov 10, 2011 at 5:40 PM
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KHLOW2008
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Ignition and distributor faults do not cause temporarily loss of power.

Nov 10, 2011 at 6:35 PM
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STUPEDMONKY
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humm.. if thats the case, wtf? my sensor 1 is brand new.. my sensor 2 is reading normal... could it possibly be my MAP, at one point about 6 months ago had the car boosted and i had to splice the map harness for a 3 bar universal MAP and sins took off the turbo soldered on the stock map connector and made it the motor "stock" with a exhaust and intake
Nov 13, 2011 at 3:30 AM
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JJIMENEZ8891
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It normally would not be the MAP sensor with out triggering a MIL. The vehicle could have High head pressure, or even possible need a valve adjustment may be cause of loss of power.Also if this had happened after the intake install or before?
Nov 13, 2011 at 3:46 AM
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STUPEDMONKY
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it just started recently.. ive had the car for over 2 years and its never done it till now. i still have the boost gauge hooked up just to see for vacuum, at idol its around 22-25 bar of vac.. and when driving normally it usually never goes about 10-5 bar of vac..
Nov 13, 2011 at 4:04 AM
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JJIMENEZ8891
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I dont belive it is a vacum issue it seems to be normal with rules out plugged exhaust issue.Any other issues recently??? overheating or anything??
??
Nov 13, 2011 at 4:24 AM
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STUPEDMONKY
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no, the car has been running great besides the this problem..
Nov 13, 2011 at 8:00 PM
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KHLOW2008
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Is the new sensor OEM?
Nov 14, 2011 at 12:31 PM
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STUPEDMONKY
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its a witch tho 02? its a denso, same number as the OEM
Nov 14, 2011 at 11:08 PM
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STUPEDMONKY
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sry for the confutation of the previous post.. i was just thinking.. if my air temp sensor was failing could it not possibly lean/ rich out my AFR if its randomly spiking?
Nov 15, 2011 at 2:51 AM
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KHLOW2008
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The only way to find out if any sensor is failing is to plug in a scan tool and monitor each sensor indivisually to compare them with specfications and note if any is at the outer edge.
Nov 15, 2011 at 2:12 PM
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STUPEDMONKY
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well this problem at got to the point where not the car wont even start..
Nov 18, 2011 at 12:43 AM
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KHLOW2008
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If the car would not start, then you need to check what is missing.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Our DIY section shows how to go about checking what is missing.
Nov 19, 2011 at 3:59 PM
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STUPEDMONKY
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so the no start was actually due to a clog in a fuel screen.. but even still with the car running again, the initial problem still persists..
Nov 21, 2011 at 9:33 PM
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KHLOW2008
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When starting from cold, do you need to crank the engine for a longer than normal time?

If there is any clogging in the fuel screen, there could be other areas that require checking for clogging. You might need to flush the fuel system.
Nov 22, 2011 at 11:27 AM
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