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1994 sputtering no power 5.7 Need advice

So I took this to the chevy dealer for a diagnostic check, they say when you give it 6%throttle it has a internal vacuum leak. So they think the problem is in the heads either a leaky guide or valve. Now I'm having a hard time with this because I have 150#s compression on all 8 with no leak...
- donjd
- Post #12
- Mar 12, 2014
- Forum: Engine Performance + Maintenance
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1994 sputtering no power 5.7 Need advice

Yes I rechecked compression on all 8 and had 150 plus on all 8.. II gave up It's down the the gm garage as we speak, I gave them $350 just in labor to track down this problem worst case scenario Is I threw away 350 bucks witch I probably did as I haven't heard from them in 2 days.
- donjd
- Post #11
- Mar 7, 2014
- Forum: Engine Performance + Maintenance
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1994 sputtering no power 5.7 Need advice

I just ordered a innova 31703 hoping to view the live data before I spend anymore money on this truck it seems to be nickle and diming me to death.
- donjd
- Post #4
- Feb 26, 2014
- Forum: Engine Performance + Maintenance
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1994 sputtering no power 5.7 Need advice

1994 sputtering no power 5.7 Need advice Allright I've been reading these forums for a couple months now and am totally lost. I have a 1994 ext cab Z71 4x4 with 5.7 automatic. The problem is it has a miss and sputters with no power when in gear. When you give it gas it just wants to stall...
- donjd
- Thread
- Feb 25, 2014
- Replies: 12
- Forum: Engine Performance + Maintenance