ToTo - Page 2

gmctrucks · 10-31-2009, 03:28 AM

Quote:

Originally Posted by BernieB

There's a difference between knowing what brand of plugs are in it and running well because the plugs aren't well matched to the engine. You're 100% right when you say an engine doesn't "know" what plugs are in it, but if that were the only criteria for the plugs functioning properly then you could just stick in any plug that fits the hole and it would work, and all plugs would be the same design because there'd be no demand for different designs. Obviously that's not true, so the design of the plug is a factor in how well they work in an engine. The experience of most of the forum members has been that Bosch plugs do not work as well in GM's as do Autolite and other brands.

Well written Bernie you get a A+ on your report card.

hotrodpc · 10-31-2009, 04:14 AM

For some reason, yes, engines do seem to know what plugs are installed in them. Back in the racing days, when we'd take our hotrods to this place that would dyno tune them. They were expensive, and always required you to drop if off with a full tank of gas, and you go it back on empty, but they were good. They dialed everything in, recurved the dizzy, rejetted the carb etc to match your cam and it always did run well. I about died to find Motorcraft plugs in my SBC. I was PO'ed and figured they just put in what they had in stock to fit. Called them up and did some chewing. They said, No, Motorcraft is what they have found that runs best in hi perf SBC's and they were put in on purpose. Called my buddy up and told him what they did. He said, yeah I know, thats what they put in my car too, and them plugs have been in there for almost a year. His car ran very well and so did my truck. But at first I sure was not having any part of those plugs. I was later convinced they were right.

TnPreacher · 10-31-2009, 04:27 AM

Quote:

Originally Posted by arnie alt

Update. I got under the truck this AM with a lite and found that all the O2 sensors are in place. Just no cat between them. Tomorrow I hook the fuel preasure gauge up, tape it to the windshield, and go for a ride. I'll see if it holds proper preasure under load. I will also do a volume test. This seems to be an air fuel ratio problem. An engine requires a lot of fuel when cold and starting to accelerate. This is when ToTo falls down. I gave thought to a bad coolant sensor. But I haven't talked myself into that yet. I still lean toward a bad preasure regulator. It doesn't leak, but may not be keeping preasure up under load. I'm not concerned about the check engine lite. Witout cats it will be on. Any one have another idea I haven't thought of....Arnie

Check the fuel pressure going down the road is a good idea. If the truck is throwing codes because the cats are gone, try and find an 02 sensor fooler and see if it helps. I've seen vehicles act funky when you cut the cats out of them. All a fooler does is trick the 02 sensor into showing the computer perfect values for what is supposed to be reading when its all running right. Also when your truck is throwing codes the ECM may be staying in open loop mode, which could cause a miss at times.

arnie alt · 10-31-2009, 05:15 AM

I wonder if we could get off this discussion of spark plugs and figure out what may ailing ToTo ? Thanx..Arnie

arnie alt · 10-31-2009, 05:19 AM

Thanx and where might I find these O2 foolers...........Arnie

TnPreacher · 10-31-2009, 07:33 AM

This for a toyota but something just like it can be rigged up fo a Chevy
O2 sensor bypass

arnie alt · 10-31-2009, 10:40 AM

Thanx Preacher, I'm not concerned about the lite on the dash. I'm only concerened about drivability. I'm open to ideas that would cure "ToTo". Take care....Arnie

ChevyMan65 · 10-31-2009, 01:00 PM

Arnie Alt, i humbly apologize for hi******* your thread. Bernie, well written, thanks
CM65

Crmzendrgone · 11-01-2009, 09:55 PM

OK the cats are part of your drivibilty. Without the cats the down stream o2s are seeing more HCs then there should be if a cat was in place. Therefore leaning out your mix or opposite. The o2 foolers sounds like a good thought.

leolkfrm · 11-02-2009, 05:01 AM

WOW every now and then we get the heated debate about plugs!!!!!!

since the problem appears to be in the open loop time period, I would check the temp sensor.
also, back presure, or exhaust flow rate will affect the 02 sensor readings, without the cats, the ecm would need to be reprogrammed.

10-31-2009, 04:14 AM	#12
hotrodpc Senior Member Join Date: Jul 2008 Location: OKC, OK Posts: 3,145	For some reason, yes, engines do seem to know what plugs are installed in them. Back in the racing days, when we'd take our hotrods to this place that would dyno tune them. They were expensive, and always required you to drop if off with a full tank of gas, and you go it back on empty, but they were good. They dialed everything in, recurved the dizzy, rejetted the carb etc to match your cam and it always did run well. I about died to find Motorcraft plugs in my SBC. I was PO'ed and figured they just put in what they had in stock to fit. Called them up and did some chewing. They said, No, Motorcraft is what they have found that runs best in hi perf SBC's and they were put in on purpose. Called my buddy up and told him what they did. He said, yeah I know, thats what they put in my car too, and them plugs have been in there for almost a year. His car ran very well and so did my truck. But at first I sure was not having any part of those plugs. I was later convinced they were right. __________________ *Winners NEVER Quit , Quitters NEVER Win !!!*

10-31-2009, 05:15 AM	#14
arnie alt Full Member Join Date: Oct 2009 Posts: 10	toto I wonder if we could get off this discussion of spark plugs and figure out what may ailing ToTo ? Thanx..Arnie

10-31-2009, 05:19 AM	#15
arnie alt Full Member Join Date: Oct 2009 Posts: 10	toto Thanx and where might I find these O2 foolers...........Arnie

10-31-2009, 07:33 AM	#16
TnPreacher Junior Member Join Date: Oct 2009 Location: Okinawa Japan till Nov, then Cali. Posts: 5	This for a toyota but something just like it can be rigged up fo a Chevy O2 sensor bypass __________________ 2003 Chevy 2500HD - Ol' Red 1978 Ford F-150 4x4 shortbed - Mighty Whitey 1977 Chevy 4x4 shortbed- Ol' Hullie 1976 Chevy K20 4x4 - Warpig 1972 Chevy C10 1954 Chevy 3800 Papaw

10-31-2009, 10:40 AM	#17
arnie alt Full Member Join Date: Oct 2009 Posts: 10	ToTo Thanx Preacher, I'm not concerned about the lite on the dash. I'm only concerened about drivability. I'm open to ideas that would cure "ToTo". Take care....Arnie

10-31-2009, 01:00 PM	#18
ChevyMan65 Senior Member Join Date: Aug 2009 Location: Northern California Posts: 61	Arnie Alt, i humbly apologize for hi******* your thread. Bernie, well written, thanks CM65

11-01-2009, 09:55 PM	#19
Crmzendrgone Senior Member Join Date: Apr 2009 Location: Arizona Posts: 1,420	OK the cats are part of your drivibilty. Without the cats the down stream o2s are seeing more HCs then there should be if a cat was in place. Therefore leaning out your mix or opposite. The o2 foolers sounds like a good thought. __________________ ENGINES PRODUCE POWER. MOTORS RECEIVE POWER. https://lastroundbestround.com/Home_Page.html

11-02-2009, 05:01 AM	#20
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	WOW every now and then we get the heated debate about plugs!!!!!! since the problem appears to be in the open loop time period, I would check the temp sensor. also, back presure, or exhaust flow rate will affect the 02 sensor readings, without the cats, the ecm would need to be reprogrammed. __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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