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| EGR Solenoid Easy Economical Replacement (Page 1/8) |
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Dennis LaGrua
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JUL 11, 08:51 PM
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The Fiero EGR solenoids have been discontinued for quite some time but there is an easy and economical replacement available that is used on the early Cherolet S-10's and it is available. Its Standard P/N VS12. The mounting and physical dimensions are slightly different but the function is exactly the same. They can be purchased for $18.68 on RockAuto ------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "
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skywurz
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JUL 11, 09:32 PM
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I have been told that GM PN 10068570 / 10137639 Delco 214365 Napa 22294 will work in place of the original but do not mount the same. I think this also may require a new updated pigtail for the plug. I think that would be Delco PT1136. Its commenly known as VS6 and is what was on the 2.8lv6 on late 80s early 90s S10s. I have not been able to verify this info. However if im not mistaken the VS12 is only a 2 pin connector it does not have the feedback for the ECU to say its open or closed this will cause a code to throw. [This message has been edited by skywurz (edited 07-11-2021).]
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Dennis LaGrua
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JUL 12, 06:08 PM
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| quote | Originally posted by skywurz:
I have been told that GM PN 10068570 / 10137639 Delco 214365 Napa 22294 will work in place of the original but do not mount the same. I think this also may require a new updated pigtail for the plug. I think that would be Delco PT1136. Its commonly known as VS6 and is what was on the 2.8lv6 on late 80s early 90s S10s. I have not been able to verify this info. However if im not mistaken the VS12 is only a 2 pin connector it does not have the feedback for the ECU to say its open or closed this will cause a code to throw.
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The last time I did this EGR replacement was about 10 years ago and the info was from memory. I just recall that we used an S-10 EGR solenoid. The Fiero EGR solenoid uses a 4 pin connector so if the VS12 only has two then it is not the correct part number. Two of the four pins are used to activate the EGR valve and two act as a control switch that would activate in case of failure. The VS 6 is a four pin connector so that's probably it. Its just uses a different 4 pin connector that will be needed. I'll try to get you some more specific info tomorrow.
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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE " [This message has been edited by Dennis LaGrua (edited 07-12-2021).]
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Xenoblast
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JUL 13, 06:55 PM
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Im interested to see the results for a cheap egr solenoid replacement. my egr solenoid seems to be working on and off now, so its probably close to death. id honestly rather delete the egr but just fixing it seems easier if theres a solenoid i could buy.
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Cunnive
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JUL 13, 11:22 PM
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| quote | Originally posted by Xenoblast:
Im interested to see the results for a cheap egr solenoid replacement. my egr solenoid seems to be working on and off now, so its probably close to death. id honestly rather delete the egr but just fixing it seems easier if theres a solenoid i could buy. |
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Same here! I have been dreading the day I would need to rebuild my 35 year old EGR solenoid but if I could get a brand new $20 then that would be fantastic!
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fierofool
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JUL 14, 08:08 AM
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I have news for you. The VS6 isn't $20. Rock Auto sells it for $70.79. Still, if it works, it's worth it. That's from a 88 S10 2.8 engine.
The VS6 solenoid is used on a wide variety of GM vehicles. Looking at the 90 S10, a video came up showing the replacement on a 7.4L V8. The one I've had on the shelf for years is marked for an 86 or 87 Buick Grand National Turbo.
For my part, the area I would have trouble with converting is that the terminals aren't marked with numbers or letters, so an S10 would need to be present during the conversion.[This message has been edited by fierofool (edited 07-14-2021).]
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Dennis LaGrua
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JUL 14, 11:33 AM
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| quote | Originally posted by fierofool:
I have news for you. The VS6 isn't $20. Rock Auto sells it for $70.79. Still, if it works, it's worth it. That's from a 88 S10 2.8 engine.
The VS6 solenoid is used on a wide variety of GM vehicles. Looking at the 90 S10, a video came up showing the replacement on a 7.4L V8. The one I've had on the shelf for years is marked for an 86 or 87 Buick Grand National Turbo.
For my part, the area I would have trouble with converting is that the terminals aren't marked with numbers or letters, so an S10 would need to be present during the conversion.
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Correct the VS6 is in fact $70 and will require a new connector but the junkyards may give you the whole deal for $10. As for the hookup I guess we will have to dig into the manuals to see which pins go where. I did one years back but didn't save the notes. As the Fiero EGR solenoid has long been discontinued, you don't see many in the salvage yards anymore and an option is needed. As for cost I believe that the Fieros EGR solenoid cost was $168 before they were discontinued. I believe that the valve uses a PWM signal to operate and with constant on-off use, this part may become more routine maintenance moving forward. ------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "
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fierofool
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JUL 14, 01:21 PM
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Dennis, I would be interested in trying the conversion on my 86SE. It's kind of my guinea pig for new stuff. Maybe schematics for the S10 can be found online. I'll do some searching.
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skywurz
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JUL 14, 09:54 PM
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If Dennis already has this working on his car for 10 years he should be able to tell us the pinout as is currently on his car
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Dennis LaGrua
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JUL 14, 10:53 PM
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| quote | Originally posted by skywurz:
If Dennis already has this working on his car for 10 years he should be able to tell us the pinout as is currently on his car |
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Did this on a customer car not mine years back. Misplaced the notes and my 60* V6 that has a good solenoid has been in mothballs for quite a while.
The pin outs on the Fiero EGR solenoid are :
A. Ignition 12V
B PWM ground signal supplied by the ECM
C. vacuum switch signal that sets the trouble code
D. Ground
Is that what you have found?
They should be exactly the same on the later GM EGR solenoids. Just got to find the S-10 pin diagram and confirm. BTW, are you ready to try the conversion? I understand that California will not allow it.[This message has been edited by Dennis LaGrua (edited 07-14-2021).]
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