So I'm so happy about the results of my latest upgrade/repair I thought I'd share my results. For starters I make the trip from Cleveland to Cincinnati about 12 times a year and use my suburban for about half of them, and I have a scangaugeII on the Burb, so I have a good account of fuel used, I also do to old fill-up math just to make double sure I'm not getting false numbers.
So here's what i did to my '97 K2500 7.4l Suburban between the last two trips.
Bosch injectors (same flow rate as OEM)
new FPR
New coil, cap and rotor
new intake gaskets
--these were done because I was having the long crank bleed down issue, on mine it was a leaky injector and a split vacuum line on the FPR--
Cleaned all of the built up grim 198k miles puts on the intake manifold and the throttle body by hand.
Ran sea foam thru the intake (this was the first time I've ever used seafoam)
Used motor medic - motor flush (again a first time)
so after putting it all back together Murphy's law caused the water pump to start leaking, costing me another $40, but it was a pretty painless swap.
now the 12.6 mpg i thought was inline with the way I drive (about 10 over and i don't tailgate), and this last trip wasn't any different, it was hot so the AC was on the whole time, traffic was typical including some stop and go in Columbus. Also this is strictly Highway mileage, when we get down their we use my inlaws accord for touring around town every time we take the Burb.
When I started this project I quickly felt like I was in over my head there's alot of things that are a PITA to get to or to just to get off the engine. I'm very happy with the results, I would've been happy with just the quick startups, but now the engine feels stronger and seems to be getting much better gas mileage.
So here's what i did to my '97 K2500 7.4l Suburban between the last two trips.
Bosch injectors (same flow rate as OEM)
new FPR
New coil, cap and rotor
new intake gaskets
--these were done because I was having the long crank bleed down issue, on mine it was a leaky injector and a split vacuum line on the FPR--
Cleaned all of the built up grim 198k miles puts on the intake manifold and the throttle body by hand.
Ran sea foam thru the intake (this was the first time I've ever used seafoam)
Used motor medic - motor flush (again a first time)
so after putting it all back together Murphy's law caused the water pump to start leaking, costing me another $40, but it was a pretty painless swap.
now the 12.6 mpg i thought was inline with the way I drive (about 10 over and i don't tailgate), and this last trip wasn't any different, it was hot so the AC was on the whole time, traffic was typical including some stop and go in Columbus. Also this is strictly Highway mileage, when we get down their we use my inlaws accord for touring around town every time we take the Burb.
When I started this project I quickly felt like I was in over my head there's alot of things that are a PITA to get to or to just to get off the engine. I'm very happy with the results, I would've been happy with just the quick startups, but now the engine feels stronger and seems to be getting much better gas mileage.