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Setting Base Idle Specs and TPS on Bosch LH2.4-Equipped Cars
1. Adjusting Idle Linkage Rod.
Ensure that when the cable drum is pushed off its endstop with a 2.5 mm feeler blade, the gap between throttle lever and adjustment screw is from 0.1 and 0.45 mm. (This is the adjustment screw that mounts on the throttle lever, not the adjustment of the larger nut that attaches the lever to the throttle plate shaft). To achieve the above spec, adjust the throttle link rod (ball-socketed connection rod between drum and throttle lever)
VOELERMAAT VAN 2,5MM TUSSEN DE EINDSTOP (3), DAN MOET DE AFSTAND TUSSEN STELSCHROEF EN HEVEL (1) TUSSEN DE 0.1 en 0.45MM ZIJN.IS DIT NIET ZO DAN MET BEHULP VAN DE THROTTLE LINK ROD (2) AFSTELLEN.
2. Checking the Throttle Body (Plate and Throttle Position Switch) Adjustment
Connect an accurate tachometer then warm up the engine. Let it idle in Park with a/c off. Pinch off the hose between the air intake and the IAC valve (don't damage the hose with something sharp!) Idle speed should drop below 500 rpm, or the engine may stop: both are normal. If idle speed does not drop, adjust as below.
MOTOR WARMDRAAIEN EN EEN VAN DE SLANGEN DIE AAN DE STAPPENMOTOR ZITTEN AFKNIJPEN. STATIONAIR MOET TERUGVALLEN TOT ONDER DE 500 TOEREN. ZO NIET,
VERDER AFSTELLEN ALS HIERONDER AANGEGEVEN.
3. Adjusting the Idle Speed
On the front side of your throttle body, there is an adjustment screw. Loosen the lock nut. Start the engine and turn the adjustment screw until idle is 480-520 rpm. Switch off the engine and tighten the lock nut while holding the adjustment screw so it doesn't turn.
STELSCHROEF (1) ZODANIG VERSTELLEN ZODAT DE MOTOR TUSSEN DE 480 en 520 TOEREN DRAAIT.
4. Checking the TPS Adjustment.
Check the gap between the adjustment screw and the throttle lever with a feeler gauge. Insert a .45mm feeler gauge. There should be no click from the Throttle Position Switch on the rear side of the throttle body when the throttle is closed. Then insert a .15mm feeler gauge. There should be a click from the TPS when the throttle is closed. If these are incorrect, then adjust as below.
VOELERMAATJE VAN 0.45MM TUSSEN STELSCHROEF (1) EN DE HEVEL. DE GASKLEPPOSITIESENSOR MAG GEEN KLIK GEVEN. VOELERMAATJE VAN 0.15MM TUSSEN STELSCHROEF (1) EN DE HEVEL. GASKLEPPOSITIESENSOR MOET NU EEN KLIK GEVEN. ZO NIET, GA VERDER NAAR DE VOLGENDE STAP.
5. Adjusting the TPS.
Loosen the TPS adjustment screws holding it to the throttle body. First turn the TPS clockwise (away from the electrical connector) until it stops. While keeping your finger on the throttle disk so it won't move, turn the TPS counter-clockwise (toward the connector) until you hear or feel a click. Continue turning until it stops, then tighten the screws. Go back to step 3 above to check the adjustment.
BOUTJES LOSHALEN BIJ DE GASKLEPPOSITIESENSOR (4). VERDRAAI DE TPS MET DE RICHTING VAN DE KLOK MEE, ( WEG VAN DE CONNECTOR ) WAARBIJ DE GASKLEP NIET MAG MEEBEWEGEN (MOET GESLOTEN BLIJVEN ) TOT JE NIET VERDER KUNT DRAAIEN. DAARNA VERDRAAI JE DE TPS NAAR DE CONNECTOR TOE TOTDAT JE DE KLIK HOORT. BOUTJES AANDRAAIEN. DAN TERUG NAAR STAP 3 OM DE AFSTELLING TE CONTROLEN.
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245 1993