Change firing order in tune???
Change firing order in tune??? Greetings,
I bought a 98Z a couple weeks ago as a project car. The car has a MTI lid, and some kind of exhaust on it. The guy I bought it from said the car has a Granatelli Maf on it, on a stock tune. I pulled the tune and compared it to a stock 98 tune and it was drastically different. I pulled the MAF and it looks exactly like the stock one, except its plastic....I dont think thats the Granatelli one. I made a stock tune so I can have a better starting place to build a tune, and I noticed that under Engine Diagnostics < General, there is a button for firing order. They had that changed to 3-1-8-7-2-6-5-4. I put it back to stock LS1 firing order and car seems to run a lot smoother, but that could also be because I changed a lot of other parameters. Anyone know why that table would be changed, and if that actually changes the firing order? Thanks!
Adam
I bought a 98Z a couple weeks ago as a project car. The car has a MTI lid, and some kind of exhaust on it. The guy I bought it from said the car has a Granatelli Maf on it, on a stock tune. I pulled the tune and compared it to a stock 98 tune and it was drastically different. I pulled the MAF and it looks exactly like the stock one, except its plastic....I dont think thats the Granatelli one. I made a stock tune so I can have a better starting place to build a tune, and I noticed that under Engine Diagnostics < General, there is a button for firing order. They had that changed to 3-1-8-7-2-6-5-4. I put it back to stock LS1 firing order and car seems to run a lot smoother, but that could also be because I changed a lot of other parameters. Anyone know why that table would be changed, and if that actually changes the firing order? Thanks!
Adam
that table does not change the actual firing order,, it is just for misfire diagnostics(what i was told) or if you phyically changed the firing order on a engine transplant running a ls computer you coulf change the tune for misfire diag.
