Topic: 22RE timing question

[Zoomschwortz]

Any problems if I advance my ign. timing more than 5 deg.? Will it mess with the computer or anything?

At 5 deg. off idle and cruise speed power sucks. I advanced the timing to 10 deg. and the power is a little better, so now I'm thinking about 12, 14 or maybe 15 deg.

Toyotas are new to me so is there something I should know about before getting to carried away on timing?

Thanks

[jimbo74]

how are you adjusting the timing? you know that a certain plug needs to be jumpered right?
timing test connector (TE+ E+) shorted set the timing to 5° BTDC

also 15* isnt much its fine if you want it there... but i would first look to make sure you are timing it right to begin with

[Zoomschwortz [OP]]

I'm sorry. Yes it is jumpered and when I dialed in my cam I also verified that my timing marker was really zero.

I'm from the old school where you advanced timing until it pings and back it off a couple deg. I just didn't know if it would cause problems with the computer controlled stuff.

Thanks for the info

[BigMike]

Nope. Please advance it as far as possible, limited only by the quality of fuel that you are burning. You really shouldn't be able to get much more than those 10 degrees that you are already at, without detonation on pump gas.

Eventually, I suppose, after +30 or +40 degrees, you would get backfires and also the fuel would ignite before the piston can even get to it's 3rd stroke, which would cause the engine to rotate in the opposite direction and stall it out....

The computer has no clue where the timing is set. It does not know if it is at TDC, +5, +10 +50. All the ECU does is just tell the igniter to fire the coil each time the sensor on the distributor cycles twice.

[alpha_radiation]

but if the knock sensor thinks its picking up a signal the computer will pull the timing. 

I found my re likes the timing around 11*

[Zoomschwortz [OP]]

Thanks for the info.
 Last night I adjusted it to 15 deg just before hitting the freeway for a 90 mile round trip. The truck has never run so good since the rebuild. Power is great (for a 4banger ) no pinging in anygear at full throttle.

I did notice if I hold the rpm in the 2750-3000 range in 3rd gear it has a mild pulsation (at first I thought it was imperfections in the road). I'm not sure why it's pulsating. Could it be the MAF or TPI?
It's running so good, I hate to back off the timing but I might need to. I will be installing an E-Locker soon and was considering going to 4:56's but it is running so well I could probably live with the 4:10's.

Any ideas on the pulsating?

[RustRunner]

I did notice if I hold the rpm in the 2750-3000 range in 3rd gear it has a mild pulsation

i have had this problem as well. it mysteriously(or maybe not so mysteriously) disappeared when i changed spark plugs and wires.

[Zoomschwortz [OP]]

Thank you for the input.
The plugs and engine have around 3000 miles on them and I just put a new set of genuine Toyota wires on last week.