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Re: Just bought another 3rd Gen 5.7L Z28
Sure do and really appreciate the V8 help!
So I have the entire weekend to wrench on this temporary problem and perform the following basic maintenance parts swap:
Spark Plugs ( YOU tell me which ones are L98 350 TPI decent? )
Cap
Rotor
Ignition Wires
PCV Valve
Coolant Flush
Thermostat ( 180* or stock 195*?)
Gatorback Poly V-Belt
Oil Change + Filter ( going Mobil 1 Synthetic VS Valvoline )
Fuel Filter
K&N Air Filters ( done )
I won't mess with the EGR valve yet but my O2 Sensors are in question and I'm not afraid to change them if it would definitely help me pass the next test. I just need your opinions about the Hydrocarbons PPM & CO% readings shown at the top of this post. I'll state that this is an original Dual Catted exhaust with a Flowmaster Cat-Back setup ( original GM catalytic converters ).
A deeper 'Search' in other L98 related websites mentioned using denatured alcohol to raise my chances to pass this test or mess with the timing. I can do the denatured alcohol bit but how much if any of you used this trick? I still have 3/4 of a tank of 87 plus Seafoam, should I expel all that and refill with 93 Super Unleaded?
Newbie Question #1: Would you Seafoam an 88K mile motor?
Newbie Question #2: When's a good time to replace the catalytic converters?
I'm being real here, the previous owner was a cop and didn't mention doing anything else besides an oil change and I did ask him about the rear and transmission fluids and he said "it's all original".
So with all that information, I have much to attack later.
Originally posted by transamtom1
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So I have the entire weekend to wrench on this temporary problem and perform the following basic maintenance parts swap:
Spark Plugs ( YOU tell me which ones are L98 350 TPI decent? )
Cap
Rotor
Ignition Wires
PCV Valve
Coolant Flush
Thermostat ( 180* or stock 195*?)
Gatorback Poly V-Belt
Oil Change + Filter ( going Mobil 1 Synthetic VS Valvoline )
Fuel Filter
K&N Air Filters ( done )
I won't mess with the EGR valve yet but my O2 Sensors are in question and I'm not afraid to change them if it would definitely help me pass the next test. I just need your opinions about the Hydrocarbons PPM & CO% readings shown at the top of this post. I'll state that this is an original Dual Catted exhaust with a Flowmaster Cat-Back setup ( original GM catalytic converters ).
A deeper 'Search' in other L98 related websites mentioned using denatured alcohol to raise my chances to pass this test or mess with the timing. I can do the denatured alcohol bit but how much if any of you used this trick? I still have 3/4 of a tank of 87 plus Seafoam, should I expel all that and refill with 93 Super Unleaded?
Newbie Question #1: Would you Seafoam an 88K mile motor?
Newbie Question #2: When's a good time to replace the catalytic converters?
I'm being real here, the previous owner was a cop and didn't mention doing anything else besides an oil change and I did ask him about the rear and transmission fluids and he said "it's all original".
So with all that information, I have much to attack later.
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