noise in engine when i step on gas or go uphill
17-Sep-2008, 05:54 PM
#1
Junior Member
Thread Starter
Join Date: Sep 2008
Posts: 9
noise in engine when i step on gas or go uphill
I sometimes hear a noise when i accelarate or go uphill.
The best way i can describe it is (small rocks in a pen being shaken)
My car is a 98 civic coupe approx 200,000km.
Does anyone know what this is? i know for sure its not the heat shield, the noise comes from the engine.
Sorry if i posted in the wrong thread im new to this.
The best way i can describe it is (small rocks in a pen being shaken)
My car is a 98 civic coupe approx 200,000km.
Does anyone know what this is? i know for sure its not the heat shield, the noise comes from the engine.
Sorry if i posted in the wrong thread im new to this.
17-Sep-2008, 06:16 PM
#2
I'd have to hear it to be sure but sounds like pre-detination. or the valves need adjusting. try running higher octane. if the noise goes away then you're looking at either your timing or carbs built up in the combustion chamber. run some seafoam (look up threads on it). If the noise stays. Have you serviced the valve clearance? how about the timing belt? when (if ever) did you change it?
17-Sep-2008, 10:34 PM
#5
20-Sep-2008, 10:38 AM
#12
still want the part number. there is no reason to think another plug couldn't find its way into the wrong parts bin. mistakes happen. that's why you need to check all 4 plugs.
the reason i'm being **** about this is b/c the alternatives are all pretty hardcore when it comes to detonation. and this is such a minor thing, i'd hate to overlook it and then come back an engine teardown later to find out it was a faulty plug.
the other possibilities are... well, a lean condition should set a CEL via the O2 sensors on an obd2a car, but you'd wanna check the O2 with a lambda sensor (wideband O2 which a real shop should have)... and our cars don't have EGR systems, so that's out of the question... it could be a PCV valve, oil vapors in the combustion chamber lower effective octane rating, so you might wanna check the PCV valve... other than that, i'd say the combustion chambers are so fouled that it's causing detonation, meaning it's time for a teardown and cleaning (but that's so unlikely that i think it ridiculous to even say it). it could be an injector too, but like I said before, that should set a CEL related to low output from the O2 sensors.
the reason i'm being **** about this is b/c the alternatives are all pretty hardcore when it comes to detonation. and this is such a minor thing, i'd hate to overlook it and then come back an engine teardown later to find out it was a faulty plug.
the other possibilities are... well, a lean condition should set a CEL via the O2 sensors on an obd2a car, but you'd wanna check the O2 with a lambda sensor (wideband O2 which a real shop should have)... and our cars don't have EGR systems, so that's out of the question... it could be a PCV valve, oil vapors in the combustion chamber lower effective octane rating, so you might wanna check the PCV valve... other than that, i'd say the combustion chambers are so fouled that it's causing detonation, meaning it's time for a teardown and cleaning (but that's so unlikely that i think it ridiculous to even say it). it could be an injector too, but like I said before, that should set a CEL related to low output from the O2 sensors.
24-Sep-2008, 08:17 AM
#13
Senior Member
Join Date: Sep 2007
Location: Cool World
Posts: 778
[quote=ol Dusty;130583 the valves need adjusting. [/quote]
i never thought of thatt, can you adjust it yourself? or is there a certain process or procedure to go accordingly ? so you dont mess up your motor lol
i never thought of thatt, can you adjust it yourself? or is there a certain process or procedure to go accordingly ? so you dont mess up your motor lol
24-Sep-2008, 04:05 PM
#17
24-Sep-2008, 04:41 PM
#18
Senior Member
Join Date: Sep 2007
Location: Cool World
Posts: 778
24-Sep-2008, 05:07 PM
#20
lol not even close. i never said we couldn't do it. just no sense in posting a massive reply to it detailing how to do it when 1. you prolly won't do it, and 2. if you were to do it, you would spend smart money on buying a shop manual anyways. i did my first valve lash when i was 15 years old, but then again i also have shop manuals for every car i've ever owned in addition to textbooks on every aspect of a car (except actual engine building/blueprinting since i'd let a machine shop handle most of that anyways).
