1996 Chevy Blazer Bogging Out

SUPERMAN4U8705

MEMBER
1996 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
267,000 MILES

My truck is driving me crazy. I had a plug wire rub out so I replaced that. Now a month later with no other problems. THEN one day I was driving out of a 2 track and my truck started to bog out. If I push the gas down much at all while it is in gear, it just bogs out and sputters. But I can rev it up while it's in park. This makes no sense to me. I don't have a clue what it could be. EGR valve? Fuel Pump is getting weak? Mass air flow sensor is shot? I have already replaces the in-line fuel filter and that hadn't changed anything. I also replaced the spark plug that was fouled out due to the wire rubbing out. Please help me! I am replacing all the plugs tonight. But I don't think that will fix anything. Thank you so much!

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Check your fuel pressure, it should be 40 p[.S.I. Minimum. Then put a vacuum gauge on it and check the vacuum. If it's low, like 15" then check your converter for being plugged.

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Tuesday, August 17th, 2010 AT 12:28 PM

SUPERMAN4U8705

MEMBER
2 POSTS

I checked my fuel pressure and it's at 40-42 psi (right where my friends same engine sits), my other thoughts where that it could be the mass air flow sensor, or the egr valve? I just don't know if there is any way the check those without just replacing them?