help.. Incorrect timing but runs OK

[FireStormNBI]

when i checked the timing of my 93 na auto, its like more than 30 degrees at idle.. i changed it back to 10 degrees but now it runs sluggish, not the same power it had before i corrected the timing.. anything i need to check? crankshaft and cam gears are in sync when i rotate the crank to TDC the cam gears also align with the timing marks on the cover..

 

its like...

10 degrees btdc = poor performance

more than 30 degrees btdc = good power, runs ok

 

this is kinda odd.. i just want everything to be within spec.

 

checked valve clearance and its still within specs. tps adjusted correctly

Edited May 13, 2010 by FireStormNBI (see edit history)

[trinitom]

not sure on supra's, but on my Integra to set the timing correctly the engine needs to run at certain lower RPM otherwise the ecu will start pulling timing and you can't get it right.

[FireStormNBI]

this is at 700rpm mate..

[trinitom]

this is what i found on the supra manual book

 

IGNITION TIMING INSPECTION

(2JZ–GTE)

1. WARM UP ENGINE

Allow the engine to warm up to normal operating temperature.

2. CONNECT TACHOMETER AND TIMING LIGHT

(See step 2 in ignition timing inspection and adjustment

(2JZ–GE))

3. CHECK IDLE SPEED

(a) Race the engine speed at 2,500 rpm for approx. 90 seconds.

(b) Check the idle speed.

Idle speed:

650 ± 50 rpm

4. CHECK IGNITION TIMING

(a) Using SST, connect terminals TE1 and E1 of the DLC 1.

SST 09843–18020

(b) Open the igniter connector cover and remove the green lead

wire.

© Connect the timing light clip to the green lead wire.

NOTICE:

• Use a timing light that can detect the primary signal.

• After finishing the inspection, make sure the lead wire is

stored inside the connector cover.

EG–20

[trinitom]

and more:

 

IGNITION TIMING INSPECTION AND

ADJUSTMENT

(2JZ–GE)

1. WARM UP ENGINE

Allow the engine to warm up to normal operating temperature.

2. CONNECT TACHOMETER AND TIMING LIGHT

Connect the tester probe of a tachometer to terminal IG of

the DLC1.

NOTICE:

• Never allow the tachometer terminal to touch ground as it

could result in damage to the Igniter and/or ignition coil.

• As some tachometers are not compatible with this ignition

system, we recommend that you confirm the compatibility

of your unit before use.

EG–18

3. CHECK IDLE SPEED

(a) Race the engine speed at 2,500 rpm for approx. 90 seconds.

(b) Check the idle speed.

Idle speed:

700 ± 50 rpm

4. ADJUST IGNITION TIMING

(a) Using SST, connect terminals TE1 and E1 of the DLC 1.

SST 09843–18020

(b) Using a timing light, check the ignition timing.

Ignition timing:

10 ± 2° BTDC @ idle

(Transmission in neutral position)

© Loosen the nut, and adjust by turning the distributor.

Ignition timing:

10° BTDC @ idle

(Transmission in neutral position)

(d) Tighten the nut, and recheck the ignition timing.

Torque: 19 NVm (195 kgfVcm, 14 ftVlbf)

(e) Remove the SST from the DLC1.

SST 09843–18020

5. FURTHER CHECK IGNITION TIMING

Ignition timing:

7–19° BTDC @ idle

(Transmission in neutral position)

HINT: The timing mark moves in a range between 7° and 19°.

6. DISCONNECT TACHOMETER AND TIMING LIGHT

[FireStormNBI]

nice info mate.. i'll try this..