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Author Topic: How would you debug my engine issues, rough running.  (Read 6687 times)

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Offline Jim

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Re: How would you debug my engine issues, rough running.
« Reply #25 on: November 08, 2016, 12:18:16 PM »
I don't see anything out of the ordinary. Your MAP and timing are following your throttle input and even though you are maintaining a constant speed on a level road, the tiny bit of throttle changes are changing those readings. If you even think of lifting your big toe, your throttle will change - especially in the lower ranges where you were cruising. Only way to eliminate that would be to set the cruise control but even then the slightest change in the road will change the load and will make your other sensors change accordingly.

If your MAP was spiking in big numbers that could indicate a problem but you're cruising around 2 lb/min so the swings you're seeing are normal.

How many miles do you have on the car?
The road to success is always under construction.

Offline ChrisPrice

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Re: How would you debug my engine issues, rough running.
« Reply #26 on: November 08, 2016, 01:31:26 PM »
Throttle body. 73,000 miles will do that. Agree with TS, clean it.

Offline timlange3

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Re: How would you debug my engine issues, rough running.
« Reply #27 on: November 09, 2016, 05:30:11 PM »
I'm at 75,000 miles now.  Build date is January, 2007.

Will work on cleaning the throttle body.

Thanks,

Tim.
Tim.

 

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