Code p1514 and p1518 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chuychevy82lwb · 09-14-2017, 09:27 PM

Ok guys I'm trying to finish up my swap but I'm getting these 2 codes. I've swapped out the throttle body with a extra one I had from an complete intake I bought to shave. I have drive by wire set up. The symptoms I'm having are I can go and test drive it and it will run fine and dandy untill I floor it.dont get me wrong I can slowly get speed and hit 85 easy but if I smash on the throttle it will go into a extreme rough idle with little to no pedal respond. Any ideas?

BR3W CITY · 09-14-2017, 11:37 PM

Look at the purple and yellow wires from the throttle body. Wiggle them and pull lightly, see if they are cracked or pulling out of the connector. Hard throttle moves the motor more and those wires are known to tug/vibrate themselves to death. Disconnect and reseat all your TAC wiring and make sure its all fully clicked.

The 1514 codes can also be triggered from MAF issues, so check the wiring and position on the MAF. Unless your running massive induction on a stock tune, its not something you'd set of commonly. I'd focus on the TAC stuff first, look at the MAF second. If neither work, might need to check some stuff in the tune, but your setup looks pretty straightforward so I wouldn't stress that yet.

chuychevy82lwb · 09-15-2017, 08:49 AM

I have a basic tune on my pcm. I'll have sure those wires are nice and tight if not I'll splice in a new(from another stock harnnes I have laying around) pigtail to see if that will solve the problem.

chuychevy82lwb · 09-19-2017, 08:19 PM

I spliced a new pigtail onto the harnnes about 10 inches or so and I still have the same problem.

BR3W CITY · 09-19-2017, 11:17 PM

If you clear the codes, does it act normal for a while before throwing the codes again? Like, if you don't mash it at all, how long will it drive around for without triggering the DTC?

Also, what do you mean by "a basic tune"?

chuychevy82lwb · 09-19-2017, 11:31 PM

I will drive for a while I'll never have the issue as long as I don't floor it. Ive had it on cruise for a good 30 mile trip with no problems just the vats delete and the rear o2 sensors deleted.

chuychevy82lwb · 05-29-2018, 10:34 PM

Still battling this demon. I just might buy hp tuners to see what's going on since I bought the pcm flashed

09-14-2017, 09:27 PM	#1
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Code p1514 and p1518 Ok guys I'm trying to finish up my swap but I'm getting these 2 codes. I've swapped out the throttle body with a extra one I had from an complete intake I bought to shave. I have drive by wire set up. The symptoms I'm having are I can go and test drive it and it will run fine and dandy untill I floor it.dont get me wrong I can slowly get speed and hit 85 easy but if I smash on the throttle it will go into a extreme rough idle with little to no pedal respond. Any ideas? __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "

09-14-2017, 11:37 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Code p1514 and p1518 Look at the purple and yellow wires from the throttle body. Wiggle them and pull lightly, see if they are cracked or pulling out of the connector. Hard throttle moves the motor more and those wires are known to tug/vibrate themselves to death. Disconnect and reseat all your TAC wiring and make sure its all fully clicked. The 1514 codes can also be triggered from MAF issues, so check the wiring and position on the MAF. Unless your running massive induction on a stock tune, its not something you'd set of commonly. I'd focus on the TAC stuff first, look at the MAF second. If neither work, might need to check some stuff in the tune, but your setup looks pretty straightforward so I wouldn't stress that yet. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

09-15-2017, 08:49 AM	#3
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Re: Code p1514 and p1518 I have a basic tune on my pcm. I'll have sure those wires are nice and tight if not I'll splice in a new(from another stock harnnes I have laying around) pigtail to see if that will solve the problem. __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "

09-19-2017, 08:19 PM	#4
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Re: Code p1514 and p1518 I spliced a new pigtail onto the harnnes about 10 inches or so and I still have the same problem. __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "

09-19-2017, 11:17 PM	#5
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Code p1514 and p1518 If you clear the codes, does it act normal for a while before throwing the codes again? Like, if you don't mash it at all, how long will it drive around for without triggering the DTC? Also, what do you mean by "a basic tune"? __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

09-19-2017, 11:31 PM	#6
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Re: Code p1514 and p1518 I will drive for a while I'll never have the issue as long as I don't floor it. Ive had it on cruise for a good 30 mile trip with no problems just the vats delete and the rear o2 sensors deleted. __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "

05-29-2018, 10:34 PM	#7
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Re: Code p1514 and p1518 Still battling this demon. I just might buy hp tuners to see what's going on since I bought the pcm flashed __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "



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