Would this exhaust leak cause performance loss?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Joined
Sep 13, 2019
Messages
27
Reaction score
16
Location
USA
I have a 1994 Chevy k1500 with the 5.7, I knew I had an exhaust leak but didn’t realize it was this bad.

The truck runs good (no check engine light) but the performance is terrible, could this be why?

You must be registered for see images attach
 

b454rat

I'm Awesome
Joined
Jul 25, 2019
Messages
1,760
Reaction score
1,482
Location
Windsor NY
Right off the manifold like that it might. But I've never really noticed a power loss with leaks....
 

Spareparts

Supporting Member
Supporting Member
Joined
Aug 12, 2021
Messages
1,157
Reaction score
1,601
Location
North Idaho
What are we seeing here. It looks broken off to me. Maybe it's the picture angle?
 

Schurkey

Supporting Member
Supporting Member
Joined
Jan 14, 2018
Messages
11,765
Reaction score
14,988
Location
The Seasonally Frozen Wastelands
Ehhh...I don't see that as a performance problem. I see it as a noise/stench/damage-to-nearby-parts problem.

OTOH, if you've roasted a plug-wire or two, sure--there's your performance issue. But it doesn't look like the plug wires are cooked from exhaust heat.

Look around for cooked starter wiring or anything else in the area of the exhaust leak.

Verify fuel pressure, connect a scan tool. Verify ALL the sensors and computer outputs.

How old are the usual "tune-up" items--cap, rotor, plug wires, plugs? Fuel and air filters? PCV system? Verify ignition timing and timing advance.
 
Joined
Sep 13, 2019
Messages
27
Reaction score
16
Location
USA
I’ve only had this truck for 6 months. 372,000 miles. The cap, wires and plugs were done recently before I got it. It runs really well at idle but If I try to give it the beans shes a let down.

I was hoping that fixing the shattered manifold would help with the performance but she’s not a hot rod she’s a grandpas truck so not too worried about performance.
 
Top