2002 Eld. pulling up codes PO101 +102 -( maf ) -PO121 - TSP & other related codes its been difficult to diagnos now I'm getting PO403 & 405 - EGR now the engine is racing which makes it difficult to inspect while running there is a loud suction leak sound which seems to be in the area of the EGR valve -- rear right hand of manifold - it sounds like an intake manifol gasket leak. I'd like input or other opinion before I pull it appart. Thanks Jimmy
Hello, by your codes and description, i thing a pice of carbon is caught under th pintle of the EGR valve. This type of linear EGr was prone to this. To check, you need to unbolt the EGR and VERY slowly lift the EGR off the manifold. handle it very careful and turn it over and see if the pintle is stcuk a little open by a piece of carbon. The reason i say handle slow and careflu is because once you start bumping or handling the EGRm the carbon piece could fall out and you would not be able to confirm this is what happened unless...you put EGR back on and it runs ok. A vacuum leak from EGR will set low MAF flow, and o2 sensor codes. i would surely check the EGR firstEMOVAL PROCEDURE