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Author Topic:   off subject question
Dirt Full Roller

Total posts: 37
posted March 30, 2005 04:07 PM  
sorry about this, it doesnt belong, but i'll do it anyway. i got a 97 dodge ram, the check engine light came on, and says incorrect purge flow. what the heck does this mean?

Dirt Freak

Total posts: 354
posted March 30, 2005 05:46 PM  
This is a code for the evaporative emissions control system. First thing to do is make sure the gas cap is tight. If the gas cap is left loose it will sometimes set a code. The purge valve or solenoid empties the charcoal canister of fuel vapors.

Dirt Forum Champ
Total posts: 578
posted March 30, 2005 07:24 PM  
no flow during purge means that the pcm is commanding the purge solenoid on. when that happens there should be a controlled amount of vacuum decay in a certin time frame. you could have a restricted line, plugged canister, a bad solenoid, or possibly a bad fuel tank pressure sensor sending incorrect readings to the pcm.
if i was gonna throw parts at it i'd start with a solenoid and make sure there isnt dirt in the canister/lines.


El Santo
Dirt Full Roller

Total posts: 36
posted March 31, 2005 02:19 AM  
This is a notorius problem with EFI Dodge pickups with gas engines. Check the line from the canister purge valve to the engine. Most of the time this line is clogged with carbon buildup and the purge valve is always open because there is not enough venting of the crankcase, thus the code appears. This should be addressed because I have seen many of engines burnt up because of excessive crankcase pressure cavitating the oil pump.

Dirt Full Roller

Total posts: 37
posted March 31, 2005 09:23 AM  
thanks for the help, i'll take a look at it tonight

Dirt Freak

Total posts: 298
posted April 01, 2005 08:16 AM  
there notorius for the vapor canister being cracked at the top when they mount to the frame, just unbolt the canister and bracket and look at the top and you will see. the canister is under the passenger side of the truck.

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