Back fire problem

B16, B18, B20
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Back fire problem

By chilango41
- Mon May 10, 2010 4:41 pm #192870 When im going up a hill or form 2,000-3,000 RPM's my hatch strarts backfiring. Other then that it runs just fine.
Can someone help me out. :(
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By chilango41
- Mon May 10, 2010 5:26 pm #192882 Last friday
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By forcefedEG
- Mon May 10, 2010 6:02 pm #192887 what engine do you have and what grade of fuel are you running, it sounds like it could be a spark nock or something, espically if your enigne only dose it under a load.... just a thought tho
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By chilango41
- Mon May 10, 2010 6:26 pm #192892 I have a b16a
I pump 89
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By teal_dx
- Mon May 10, 2010 7:40 pm #192907 now it's getting to be a tough one...
have you checked ignition timing with a timing gun?

I think it's definitely ignition related.

are your grounds good? (valve cover, thermostat, tranny housing)?
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By chilango41
- Mon May 10, 2010 7:50 pm #192908 I haven't checked ignition timing with the gun.
Yea all of the ground are good.
This problem started after I adjusted the valve lash, maybe that affected it?
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By blk92hb
- Mon May 10, 2010 10:14 pm #192924 It could be the valve lash. Mine did that when i replaced the cam in my d16 after i adjusted the lash it was all better. I would check the lash first then the ignition timing
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By teal_dx
- Mon May 10, 2010 10:24 pm #192931
chilango41 wrote:This problem started after I adjusted the valve lash, maybe that affected it?


well there you go :thumb:
Hondas are engineered pretty well. Usually when you change something and then a problem starts, it has to do with what you changed.
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By forcefedEG
- Tue May 11, 2010 12:37 pm #193015
chilango41 wrote:I have a b16a
I pump 89


b series vtec engines recomend 93 or higher.... and a b16 has 10.5to1 and maybe higher depending on, the factory ecu is ment to use 93... not sayings its all ur prob but may help, did you adjust your valves like you said you were before in the ohter thread?
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By chilango41
- Tue May 11, 2010 4:16 pm #193068 So should I pump the higher gas now?
I just adjusted the valves on saturday and it started freaking out ever since then.
Yeah im going to check the timing today maybe that will help.
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By forcefedEG
- Tue May 11, 2010 4:33 pm #193076 id double check the valves, they may be too tight, double check them you just want a slight drag on the feeler guage... and then id get high test gas... :thumb: if you never touched the timing belt when you did your tuneup that shouldnt be an issue, but double checking dosent hurt...
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By chilango41
- Tue May 11, 2010 4:41 pm #193081 I did double check the valves.
I've heard that you cant just go and pump higher grade gas but :?
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By forcefedEG
- Tue May 11, 2010 4:47 pm #193085 where i live you can get 87 89 and 93 some places ive seen 97 but not loacally.... anything 93 or higher is fine to use...
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By chilango41
- Tue May 11, 2010 4:49 pm #193089 I think we only go up to 91, ill drive around and check out the gas stations.
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