Hello everyone, it's been a while,
90 auto with mild bolt-ons- double IC, raised top, 10% pulley, exhaust, Mac intake. 120,000 miles. Recent maintenance- head gaskets/valve jobs and spark plugs.
I have been wondering for a while about the throttle response from idle of my SC and if it's normal or if there's a problem. The engine puts down plenty of power and doesnt misfire at idle or under load (except for next paragrah). Compared to my blown GM 3.8 the response seems very sluggish. My thoughts are the sluggish response may be due to the IC plumbing and bypass valve, i.e. the nature of the beast. Anybody notice the same with their near stock SC? This is something I only noticed after buying my GM which was about 5 years ago. I'll try posting vids to compare the 2.
One other problem with the car is during cold starts. I remember when it was a low mile car, when starting the engine the rpm's would shoot up to maybe 1500-1700, then gradually decrease like many other vehicles do. Now, when it starts, there is some misfiring for a short moment, and then it smoothes out. Does that make any sense? When warm, it starts normal. My guess is an IAC, but I dont want to throw parts at it. No CEL.
Thanks for looking and happy holidays,
JJ
Car is also throwing a code 49, see below
90 auto with mild bolt-ons- double IC, raised top, 10% pulley, exhaust, Mac intake. 120,000 miles. Recent maintenance- head gaskets/valve jobs and spark plugs.
I have been wondering for a while about the throttle response from idle of my SC and if it's normal or if there's a problem. The engine puts down plenty of power and doesnt misfire at idle or under load (except for next paragrah). Compared to my blown GM 3.8 the response seems very sluggish. My thoughts are the sluggish response may be due to the IC plumbing and bypass valve, i.e. the nature of the beast. Anybody notice the same with their near stock SC? This is something I only noticed after buying my GM which was about 5 years ago. I'll try posting vids to compare the 2.
One other problem with the car is during cold starts. I remember when it was a low mile car, when starting the engine the rpm's would shoot up to maybe 1500-1700, then gradually decrease like many other vehicles do. Now, when it starts, there is some misfiring for a short moment, and then it smoothes out. Does that make any sense? When warm, it starts normal. My guess is an IAC, but I dont want to throw parts at it. No CEL.
Thanks for looking and happy holidays,
JJ
Car is also throwing a code 49, see below
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