Fix of The Week 11/16/18

Fix of the week

 

Fix of The Week

Every week we’re posting our favorite head-scratchers and interesting mechanical issues submitted by our Direct-Hit customers.

For a chance to have something you’ve worked on appear as a Fix of the Week, and win a cool little prize for your shop, all you have to do is post your unique fixes in Direct-Hit. Just look up the vehicle you’re working on, click on Post Fix at the top right, then tell us the problem and what you did to fix it.

 

This Week’s Winners

On this edition of Fix of The Week: a surging Acura, a coolant spill in a Subaru and a blacked-out Prius.

 

2010 Acura MDX – Accurate Autoworks

This vehicle’s engine came in due to surging at idle. The check engine light also came on whenever the driver came to a stop after driving on the highway.

We verified malfunction and checked fault codes, which showed P2101 and P2176. We then Inspected the electronic throttle body and found the throttle plate stuck partially open. When pressed, the plate wouldn’t close. When we opened it slightly, it would close after release. We observed that the electronic throttle body was binding internally and contacted the dealer regarding sales history and part availability. The dealer said the part was commonly sold and in stock, so we replaced the electronic throttle body, cleared the fault codes and performed an idle learn which tested ok.

 

2008 Subaru Outback – SNR Auto Service

The Outback was experiencing random multiple misfires. After a hot soak, we found the coolant was low in the radiator and the recovery bottle was full. We filled the coolant and ran the vehicle and observed compression leaking into the coolant jacket through the cylinder head gaskets. We then pressure tested the cooling system, and found coolant leaking into #3 cylinder. Replaying the cylinder head gaskets solved the issue.

 

Toyota Prius – Brad’s Foreign & Domestic

After a road-side towing service replaced this vehicle’s 12-volt battery, it wouldn’t start again. The SES light came on in the dash, but all other parts of the dash and display were dark. We attempted communication with scan tool which was a bust, and there was no power to DLC. We then. checked the HV service connection at the HV battery.

The towing service had disconnected it to change the 12-volt battery but that test checked out; the tow service replaced it correctly. We checked fuses at the under-hood fuse block and found half of the fuses in the block did not have power. Inspection of the 120-amp main fuse revealed voltage through half of the block—the other half had no power. The main fuse has several points that supply power to the various circuits; we removed the clear plastic cover on the large 125-amp main fuse and inspected each leg of the circuits (if any of them are open, the system power will not activate the power relays). We replaced it with a 120-amp and the vehicle ran fine.

 

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