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**Juglenaut** · 11-26-2005, 03:15 AM

RE: Remove Catalic Converter...Better Gas Milage?

Do more research on fuel economy.....More HP equals more gas, Less HP equal less gas. You will get better spool up, changing the power band, will not really give you more economy through the powerband.

I would experiment with cylinder shut down and valve manipulation. Modifing an engine to accept vaporstate fuel will greatly improve fuel economy.

**RollinonZ34** · 11-26-2005, 09:42 AM

Well i'm no Mechanic, and that last part of your reply was Greek to me, but i Think you just called me Heavy Footed

Yes i will admit that i do lately use the Auto Stick Shift like a standard so that i can Red Line it whenever possible...Sooooo Fun this car is!!!

But what i am talking about is just from regular driving. I noticed that i went from Excellent gas milage (around 26-27 gal) and then i did the whole replacement of the Lower Intake Gasket & fixed that leaky cap where the distributator used to go..also Timing Belt & all Pullies related with that, and also replaced every sensor that i could get to including a lot of vacuum lines while the top was off.. Problem now is that i actually get Worse gas mileage (16 to 20) if i'm lucky... I just don't get it. The only thing i did not fool with was the Regulator on the Fuel Rail even though i did put the new little round o-rings on the Fuel Injectors for when i put them back on after Intake removal...any ideas why my milage S*@Ks so much worse than before my rework on the Beast.....Paul

**Juglenaut** · 11-26-2005, 02:39 PM

Engine timing can either take more or less fuel as the computer compensates for different usable timing settings. I was getting 18-20ish with my GTP and it was par, with some modifications, and a manual trans.

Sounds like either the timing is set umatched slightly, or you haven't reset/reprogrammed the Mem-cal for stock starting points for calibration.

**Dave96z34** · 11-26-2005, 02:55 PM

This kid sounds like he is 15 and just got his license. Why do you care so much about gas mileage. Just get a job that can support you driven habits. The way you talk runing the car around the redline at all times your car is going to be blown parts left and right. Gas milage is going to be the least of your worries soon.

Im just haven a bad day

**Juglenaut** · 11-26-2005, 03:42 PM

I care about MPG because I don't have a choice.....Getting a high paying job is easier said than done, especially in SD.

My cav gets about 40 mpg now after some tinkering with stuff, stock is 35ish. I haven't dared yet to make a cylinder shut off on this car since it is a 4 banger. I wish my cav had a throttle body injected system, over the MFI set-up.

**Dave96z34** · 11-26-2005, 03:56 PM

What you have is far far superior in HP and mpg.

**RollinonZ34** · 11-26-2005, 06:34 PM

First of all Dave96, I am not 15 years old, but a well broken in 42 year old...

Yes you are havin a bad day to come off like that,,, instead of helping me remedy the problem as to what sensor or changed or what i did, that would make me go from Excellent to Poor Gas Mileage!!! That is all i was asking for in my question, as i explained all of the things that i did myself---Thanks to the Help from the KIND People on this site, as i have never turned a wrench before, and this 60degreeV6 site gave me the courage and ability to tackle the jobs mentioned above! After all, this is not an easy Motor to work on and have had Mechanics tell me that they wouldn't touch it with a 10 foot pole. So naturally i felt a little proud to be able to do the job myself and when it all was hooked back up and no Service Engine Soon lights lit up...a good feeling! And yes an even better feeling is to red line it on an onramp and leaving everything else behind!!! I have over 170,000 miles on the car...all put there by yours truly, and every one of them was putting that motor to the test! I am sorry i don't wuss out like you seem to do as this motor is made to Scream, and for your information i am an Insurance Adjuster in Louisiana so i can bet ya that i make Plenty of Cash to support my driven habits!!!!!

**Juglenaut** · 11-26-2005, 10:58 PM

I just turned 27.

I had deep feelings for my GTP man, I know what you mean. That monster wooped SCSII GTP's

**RollinonZ34** · 11-26-2005, 11:38 PM

Juglenaut, Thanks for your Positive input on helping me figure out the loss of gas mileage...

how do i go about the reset/reprograming the Mem-cal for stock starting points for calibration?

The shop i put the car in after i did the Timing Belt and other things put the car through the Diognosis test and said that the Timing was correct and Right on the money. I bought and used all of the proper tools to do the Timing, but did not know that a reset/ reprograming of the Mem-cal was needed.

I will also be changing the Timing Belt in about 20,000 more miles and will attempt the Advance/retare that Ben talked about, after i buy the cool tool that he or others Created....It looks Cool and will make it easier to do, as i chickened out and just put it to stock Timing when i did it the first time.

Any input will help....Thanks, Paul...and Dave...i did not mean to sound like an ass to you, but you need to think before you speak because this is not a Forum to bash people, but a Forum to help others like me that are not so mechanically inclined!!!!!

& the Truth is that i really don't care if i blow up the Motor as i will just drop in another one as i really like this car and the way it handles. Anyway, i am in the process of buying a Harley Sportster as a backup, but with all of the Doggin-out i have done on this car since day one, it has never let me down...This Motor seems to get Stronger and Faster as it ages. Maintenance is the Key!

**Dave96z34** · 11-27-2005, 02:08 PM

I can write in bold too. You had a choice of performance or gas mileage and you picked performance so its going to suck gas.

**RollinonZ34** · 11-27-2005, 05:56 PM

Once again Dave, you need to Read & Think before you speak. I did not mention anything about adding anything other than Stock ACDelco components other than i did use a Gates Timing Belt...

So why do you say that i am making a choice between Performance and Gas Mileage? If you had read this thread you would have noticed that i had mentioned less gas mileage during regular Normal Condition driving,...in other words Driving conditions did not change from before and after i did all of the Maintenance...oh sorry, did not mean to upset you with the Bold Print

Now do you think you could send some words of advise like Juglenaut has instead of arrogant statements? And by the way, i did not mean to say that i Red Line the Tach out every time i drive, but it is fun to do on occasion. This car would not be @ 170,000 mi. if i did not take proper care of it, and has never been abused to the point that the Motor is going to Blow apart like the 15 year old naive kid that you think i am, would do!

Anyway, this car is made for fun"in a safe manner" and should be Tached out every once in a while to burn off carbon if not just to enjoy...

yea i know...Im just haven a bad day too...

Peace

**Dave96z34** · 11-27-2005, 08:14 PM

Truce

**dohcfiend** · 11-28-2005, 12:33 AM

ok people, let's face it 99% of lq1 owners redline their car. that is what they are made for, hell you don't even hit max hp until 5500. every1 has a choice on how they drive their car, i am in no position nor should any1 be to tell some1 how to drive their car. he paid for it, let him enjoy it how he pleases.

all that stuff isn't necessary to remove the cat, it is usually a 20 minute job. if the exhaust is stock, get some penetrating oil and shoot the 4 bolts on the converter flange as they are usually rusted together. get yourself a socket wrench and a breaker bar. assuming none of the bolts were rounded get yourself and 18 inch extension and a 15mm universal socket, remove the 2 downpipe bolts and remove the downpipe assy.

put the end that came off the manifold in a trashcan, get some kind of breathing protection b/c supposedly if inhaled the converter stuff can cause cancer. then get a crowbar and a hammer, 1st the orientation start jamming the crowbar in there and after that use the hammer to drive it all the way through and work it around and break up all the converter material and it all should be deposited in the trashcan.

bolt it back up and you are done.

note: although there is no smog test i am sure there is a law stating you have to have a cat, so gutting thexisting one is the best option as it will still be there in appearence. next, it is ALOT cheaper this way too. gutting your cat will add fuel milage as well as a little kick in the pants to mid-high range power. hence the earlier obseration of hp and gas mileage. lastly, if you do round a bolt, pull the entire exhaust and drill it out. i also recommend putting new bolts back in when re-installing. pulling the entire exhaust is a cakewalk as almost all of it is help in by rubber hangers except fro 2 10mm bolts at the mufflers.

as far as your mileage situation goes it is very difficult if not impossible to troubleshoot over the internet. as long as you are persistant and patient, i think you will be able to get it nailed.

lastly, i wil disagree with your mechanic lq1's are easy to work on IMO. hope this helps.

**RollinonZ34** · 11-28-2005, 08:10 AM

dohcfriend...That is the Proper answer that i was looking for, straight to the point without all the shoving match! no offense Dave as i am sure you are fun to drink beer with!. dohcfriend is a good name for you and truly as asset to this site!
Thanks, Paul

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[b]Remove Catalic Converter...Better Gas Milage?[/b]

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