Insufficient egr flow

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Aug 12, 2011 | 10:06 PM

My Good 'ol 92

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Insufficient egr flow

Hey guys, im new to the forum, and i already have a question for you guys! About a month ago i purchased my first truck, a 1992 ford f150. Slowly but surly im knocking out all of the error codes, but one has me stumped. Insufficient EGR flow. When i started to investigate the problem, i noticed that the hose attached to the EGR valve was in horrible shape, so i replaced it, i also sprayed seafoam down the EGR vavle, but i am still getting the off and on check engine light with error code 332 (insufficient EGR flow). i am not sure what else i can really do at this point. The truck has the 5.0L 302 if thats any help.

Any help appreciated!!
Thanks in advance guys!!!

Aug 12, 2011 | 10:09 PM

ChristopherN

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From: Northern IL

Well, if you cleaned it and it helped the problem to go from always failing to only partially, I would try cleaning it again and if the fault comes back, replace the EGR.

Aug 12, 2011 | 10:14 PM

My Good 'ol 92

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Ya, thats along the lines of what i was thinking. is the problem within the EGR vavle? or could it be somewhere else aswell?

Aug 13, 2011 | 07:45 AM

rla2005

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From: Kentucky

For your 1992 truck DTC 332 definition is this: EGR valve opening not detected.

There is no way the PCM can actually measure EGR gas flow like the later model trucks. Your 1992 uses an EVP style EGR valve position feedback. The later model 1994-up w/MAF type fuel injection used a DPFE style that did measure EGR flow.

Verify the EVP signal is correct at different vacuum levels applied to the EGR valve. The EGR circuit consists of several components. The EGR valve, EVP, EVR (EGR Valve Regulator) and vacuum hoses. If you found one section of hose bad, you will probably find more. Make sure the connector to the EVP is on tight.

For reference:

Ford Fuel Injection » EGR Valve Position sensor (EVP)
Ford Fuel Injection » EGR Vacuum Regulator (EVR)

Aug 14, 2011 | 10:09 AM

My Good 'ol 92

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It sounds like there is alot i did not know about the matter. thank you rla. the hose i replaced was the thin one running from the egr to the intake manifold. where else should i check?

Aug 14, 2011 | 12:10 PM

rla2005

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The EVR is in between the manifold and the EGR valve itself. There should not have been a direct connection from the manifold to the EGR valve. That would open the EGR valve every time the engine was running.