Surging? Misfire?

[sjrobinson]

So its happening again- worse. Ima just copy and post my question from yahoo answers cuz I’m too lazy to explain it all.

Topic

[dreamer2355]

You can test a MAP sensor with a simple DVOM and a hand vacuum pump if you suspect that is an issue._x000D_
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However, usually it would throw a CEL if a sensor is at fault.

[moparfan]

where are them pics of that sensor you talked about in the other thread?

[sjrobinson]

@dreamer2355- I have no idea what that test is but if theres not check engine light ill move on. The biggest thing I’m focusing on is that it is definitely when the car goes from open to closed loop.

[EricTheCarGuy]

Have you checked for vacuum leaks?

[moparfan]

have you confirmed the issue during open and closed loop change yet with your scan tool?

[sjrobinson]

@Eric

[moparfan]

really at this point i feel you may need a scope to ferther diagnose this issue. if i remember right you checked all mechanical timing and did a proper tune up and had good fuel pressure? since it is not consistant with anything really other then the comp

[sjrobinson]

Ive tried the throttle body cleaner vacuum method a few times now. I did not try the fuel pressure test though. I got the guage and although the seller said it worked on my car it did not fit so I sent it back. But eric said its a waste of time looking th

[sjrobinson]

oh hey, thats a cool trick. it works on all front engine cars?

[moparfan]

Quoted From sjrobinson: _x000D_
_x000D_
oh hey, thats a cool trick. it works on all front engine cars?

_x000D_
_x000D_
for the most part yea!!

[EricTheCarGuy]

If the O2 readings are normal then I don’t think there’s a problem there even as it crosses into closed loop.

[sjrobinson]

Yup, we did but we kinda went around it cuz the IAC would cause a check engine light. I can take a look at it but its a hard thing to get out. Someone suggested loosening to mounting brackets to tip the engine forward so that I can reach back there to get

[EricTheCarGuy]

You can do that but it may not be as bad as you think, a 12mm wrench usually does the trick for me._x000D_
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http://www.youtube.com/watch?v=0IcfeyA3L3E

[sjrobinson]

Before I go and do that- cuz I’m trying to solve this problem without spending too much time taking apart my car (I fear breaking something)-_x000D_
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I have another event that may narrow this down. The idling issues have stopped for now. The only thing that is

[EricTheCarGuy]

Honda MAP sensors hardly ever have a problem so if you have damaged wiring I would suggest repairing that properly (soldering it) and then recheck for the symptom.

[Author]

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