Golf GTI L4-1984cc 2.0L DOHC (9A) (1990)
transmission only)
To ensure proper electrical connections as well as the latest production level, both knock sensor (KS) and EGR temperature sensor connector terminals
must be gold-plated. To check, follow this procedure:
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Disconnect electrical connections from knock sensors (KS) 1 and 2, EGR temperature sensor and throttle position sensor (TPS). If connector
terminals are tin-plated, replace the respective component with:
Harness Terminals
Check harness terminals if NOT gold-plated replace as follows: *
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Pull back protective boot from receptacle plug.
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Push wire connector out of plug, one at a time, using tool from tool kit 000 097 013 or similar.
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Cut terminal, strip wire and crimp gold-plated terminal, Part No. N 903 352 07 to wire, using crimping tool from tool kit No. 000 097 013.
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Reinsert terminal into housing and proceed to next wire.
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After all wires have been modified, pull boot over receptacle plug and connect.
C. Replace Vacuum Hoses
C. Replace vacuum hoses
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Replace all vacuum hoses (see arrows) with new hoses using same length except for the hoses indicated below.
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Replace vacuum hose at yellow line connection to EGR valve. Measure old hose and add 1 in. to new hose.
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Replace, vacuum hose at red line connection to throttle body. Measure old hose and add 1 in. to new hose.
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Use new hose, Part No. N 020 353 5*