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Thread: sloz28 down!
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03-04-2017, 02:15 PM #1
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sloz28 down!
Drove my 96 z28 on Friday, let it sit on Saturday because of a storm. On Sunday I went to drive it and now it will only start if you give it 100% throttle and has a misfire. The electric fans won't come on unless AC is on. Coolant temp on the dash is working, engine gets hot and my handheld code reader is saying it's ice cold. Coolant temp sensor in the water pump? I'm at a loss with this.
1996 Chevrolet Camaro z28 lt1, A4, t-top, throttle body bypass mod, Texas Speed and Performance rumbler cat-back, shift kit, Moroso cold air intake, Air foil, BMR torque arm, BMR lca's, BMR adj panhard bar
Best run: 13.58 @ 103, 2.06 60'
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03-05-2017, 05:20 AM #2
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Change the sensor in the pump. It's reading soo cold that it's wanting to dump all the fuel on start up hence the 100% throttle and fans wont come on cause the PCM thinks it's not time too. The second sensor in the head is why the dash reads right.
2012 Sierra - 5.3, Summit "Stage 1" Truck Cam
1994 Jimmy - LS? LT? 4wd? AWD? Time? Money?
1994 Formula - 5.3, Terminator X, Billet VS7875, "Best Cam", T56, QP 9"
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03-05-2017, 11:41 PM #3
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+1. Had a car at work with similar conerns and it was indeed a faulty coolant temp sensor in the pump. New sensor and car was good to go.
Originally Posted by Sahara54
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03-06-2017, 09:35 AM #4
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How to test sensor and circuit, courtesy of Shoebox - be sure to scroll down below the resistance table:
http://shbox.com/1/4th_gen_tech2.html#ectSOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.
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