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FM Interference when key is at ''ON''

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Old May 13, 2022 | 09:48 PM
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Icon5 FM Interference when key is at ''ON''

Hi!

I have been having issues for a while from the FM radio on my 98 Integra. Works very very good when key is at ACC, but when I switch to ON I get bad interference on hard to get stations... I search by removing fuses and found that the fuse 13 Fuel Pump (SRS UNIT) was causing the problem, search deeper and fond Fuse 44 - (FI E/M 15amp PGM-FI main relay) that is on the same circuit is also causing problem, as soon as I remove that fuse it's perfect.

I tried to disconnect the injectors, disconnect the external coil, shut the fuel pump OFF, disconnect the IACV and those tests did nothing. Last thing on that circuit is the ECU, Disconnected connector, ''D'' nothing happening, Same for connector ''C'', but when I disconnected the connector ''A'' it was perfect... Something on the connector A is causing me trouble... I made sure all the important grounds are good with metal to metal contact

Any inputs on what could be my problem?

Thanks in advance!
.

Last edited by DomGS-R; Jun 26, 2022 at 10:05 PM. Reason: update on my testing
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