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A/C & heat cause the engine to surge
'91 GMC C1500 5.7L (350). I changed my alternator yesterday and my actuators started working. That kind of excited me because they weren't working before. However, now when I turn on the heat or A/C the engine surges up and down a few hundred rpm (estimate because no rpm gauge.... But it's not...- KYplumber
- Thread
- Replies: 22
- Forum: Engine Performance + Maintenance
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Alternator amp upgrade
Hey guys, new member, so I hope I'm in the right forum. My wife and I recently bought our '91 GMC C1500 (5.7 L 350) and I noticed the volt gauge showing low voltage. The truck has had a few small issues that could have been caused by this and I'm wanting to change the alternator asap, but I'd...- KYplumber
- Thread
- Replies: 3
- Forum: Audio + Electronics
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Creating the perfect '91 C1500
Finally found a group of people with good taste. My wife and I love all the GMT400. After our '89 died we bought our '91 which we plan to build into the perfect cruiser. The 5.7 is strong and with only 139k I'm confident we found a great candidate. The trans has a slight slip between 1st and...- KYplumber
- Thread
- Replies: 4
- Forum: Introduction
