Check engine light

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Dec 29, 2011 | 01:54 PM

flyboyaviator

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Check engine light

Started my 91 Z-28 and right of the bat, the check engine soon light came on, then the engine began to run on and off, open the hood and began to touch cables, when I check the module located rigth on to of the intake manifold, the engine run well, so I squeezed the connection a few times and the engine will almost stop, any how, went back inside and noticed that the check engine soon ligh was gone, and the engine ran fine after that. what module is that located on the intake maniflod ?(newB here) thanks for any info.

Dec 29, 2011 | 03:15 PM

evilemokid94

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Posts: 3,670

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From: Elwood, IN

Car: 1986 camaro Sports Coupe

Engine: L31 350

Transmission: 89 700R4

Axle/Gears: 3.42 gov lock

Re: Check engine light

Tps and the iac I think

Dec 29, 2011 | 06:17 PM

flyboyaviator

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Re: Check engine light

Quote:

Originally Posted by evilemokid94

Tps and the iac I think

thanks evilemokid. I need to buy tps. what is the iac?

Dec 29, 2011 | 06:32 PM

Tuned Performance

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Posts: 16,930

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From: Mile High Country !!!

Car: 1967 Camaro, 91 z28

Engine: Lb9

Transmission: M20

Axle/Gears: J65 pbr on stock posi 10bolt

Re: Check engine light

iac = idle air control

Dec 29, 2011 | 06:48 PM

flyboyaviator

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Re: Check engine light

thanks tunedperformanc

Dec 29, 2011 | 08:05 PM

vetteoz

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Posts: 7,736

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From: Not in Kansas anymore

Car: 82 Z28

Engine: 383 SP EFI/ 4150 TB

Transmission: T400

Axle/Gears: QP 9" 3.73

Re: Check engine light

Quote:

Originally Posted by evilemokid94

Tps and the iac I think

MAP sensor is on top of 90 -92 TPI intake

TPS is on the pass side and IAC is underneath the TB.

Feb 12, 2013 | 09:11 PM

Guest

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Re: Check engine light

Quote:

Originally Posted by vetteoz

MAP sensor is on top of 90 -92 TPI intake

TPS is on the pass side and IAC is underneath the TB.

(HOLY thread bump batman) Hey, whats thats sensor on the -bottom left in that pic? Im replacing ALL my sensors.

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Feb 14, 2013 | 07:56 AM

Guest

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Re: Check engine light

Anybody?

Feb 14, 2013 | 09:08 AM

Twin_Turbo

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From: Enschede, Netherlands

Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98

Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI

Transmission: T5, 700R4, T5, 700R4

Axle/Gears: 3.08, 3.27, 3.45, 3.27

Re: Check engine light

coolant temp switch for cold start injector

Feb 14, 2013 | 02:24 PM

#10

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Re: Check engine light

Quote:

Originally Posted by Twin_Turbo

coolant temp switch for cold start injector

wah...then whats the other 1?

cold start switch
temp probe
temp probe for cold start.

^^^
Is that right?

Feb 14, 2013 | 03:13 PM

#11

Twin_Turbo

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iTrader: (25)

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From: Enschede, Netherlands

Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98

Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI

Transmission: T5, 700R4, T5, 700R4

Axle/Gears: 3.08, 3.27, 3.45, 3.27

Re: Check engine light

the other one is the coolant temp sender (CTS) for the ECM IT has a weatherpack connector, the one for the cold start injector is the brown one and has a injector type connector with metal wire clip. The top is a hose pipe for the water hose to the TB

Feb 14, 2013 | 03:28 PM

#12

manolis1969

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Joined: Jun 2001

Posts: 397

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From: new york , n.y. , USA

Car: klowny1969 <-youtube 4 3rd gen vids

Engine: subscribe to klowny1969 on youtube!

Transmission: subscribe to my channel on youtube

Re: Check engine light

make sure that your wires going to it are good..take the connector off and even wiggle the wires one by one to see if you find any loose connections.Also wiggle each wire while the motor is running to see if the motor shuts off....I actually made a video last night about how to take the pins out of the connectors and how to check the wiring..check out my youtube channel..search KLOWNY1969 and go to my video labeled how to fix/inspect electrical connectors..also subscribe for future 3rd gen related "how to videos" thanks!