Chevy86 IROC-Z

iTrader: (17)

What about the leaves under the relays, do they have a part number?

Chevy86 IROC-Z

iTrader: (17)

Just kidding. Your relays are different than mine are on my 86 IROC. But then agian, you have a 88GTA.

y84pauloflondon

I'm pretty sure that yours being a IROC and his being a GTA has nothing to do with the difference in relays, its the years that matter. 85-87 TPI uses one type(square) and 88-92 TPI uses the 2 oval, 1 square type.

Chevy86 IROC-Z

iTrader: (17)

Yup. Relays, I agree 100%. They all do the same thing. I should of made myself clear. My IROC has 3 square connectors as to where Ward has 1 square and 2 oval.

Ward

iTrader: (1)

Yeah, I know it's a mess - the car has been parked for a while and I'm finally working on getting it road legal again. I cleaned out those leaves today, and found a dead praying mantis in there as well

ryegrass

I'm the original owner of a 1987 IROC, 5.7 TPI (bought it new at the end of 1986), and my relays are in the same order as yours (no one swapped them). MAF power is next to the engine, Fuel pump center, and Burn off closest to the fender.

Chevy86 IROC-Z

iTrader: (17)

Your the original owner, and you still got her? You must lover her lots.

ryegrass

Yep I probably could have had a Lexus for all the repairs I put into this baby over 23 years, but there's lots of very good memories as well.

Chevy86 IROC-Z

iTrader: (17)

Good for you bro. I remember when I threw piston rod #5 while driving to work. It started with a little knocking sound, then it advanced to a loud banging sound until the block just froze. 7 years later, she woke up with a 350. But now I need a new tranny. My IROC only has 1st gear and 3rd. Bummer.

ryegrass

That's too bad about your tranny. Unless you have specialized tools it's going to be expensive. My car just has a lot of little things (hatch motor, weather stripping, worn upholstery, paint etc.) as well as a code 33 which is why I was checking the forum. I think the MAF power relay just came unseated from driving on a rough road (the locking portion is cracked). Re-seating the relay seemed to work however I decided to replace it with a new GP MR22 from AutoZone (listed in an earlier post as being a direct replacement part) and had a solid check engine light so they're probably not the same part (will most likely get one from GM).

Chevy86 IROC-Z

iTrader: (17)

I had a solid code 33. Here's what I did to get rid of it. Take off the MAF Sensor and seperate it from the dual intake duct and the spring like tube that connects into the throttlebody. Now under the MAF there should be 5 pins. Get a dremel and clean off the the pins. Then just reconnect and drive on. Worked for me. If it doesnt help, let me know. I got a diagram to troubleshoot the MAF.

Beater79TA

Definitely get the GM one. I went through 3 of the Autozone ones without any luck. The GM one fixed the problem.

Chevy86 IROC-Z

iTrader: (17)

To check if the MAF Senser is bad, follow this thread that I made. I found these troubleshoot from the net. https://www.thirdgen.org/forums/tpi/...uble-code.html

ryegrass

Thanks for all the suggestions, everyone at the forum are always very helpful. There is no code as long as the MAF power relay is not loose, or wet from rain. I just want to replace it because the locking mechanism which holds the cable in is broken. Unfortunately the AutoZone relay is just not the right part.

y84pauloflondon

Your runs in the same order as who? Ward's relays: fuel pump, MAF power, burnoff, which is the same as my 87 GTA.

ryegrass

Chevy86 IROC-Z, post #39

y84pauloflondon

Yes, sorry, I saw that after I posted.

y84pauloflondon

I don't think its really important what the order is, as long as you(owner) know what each relay is for! The reason for the difference in the relay order could due too the fact that the Camaro and Firebird were built in different factory's. And even with the TPI engines, Firebirds have their alts and AC compressor reversed compared to the Camaros.

ryegrass

That's interesting, I didn't know that the alternators and AC compressor positions were reversed from Firebird to Camaro.

Stephen

iTrader: (12)

They aren't.

The only change in locations came from the switch between v-belts & the serpentine belt. Then the AC compressor & alternator swapped positions.

Chevy86 IROC-Z

iTrader: (17)

Different IROC-Z years also had the AC and Alternators switched around (belts and serpentine system).

y84pauloflondon

So, regardless if its a Caramo or Firebird, if your running the 4 belt system, Alt is on passenger side and the AC is on driver side.

And when running with the single serpentine belt setup, Alt is NOW on the driver side and the AC is on the passenger side.

Is my understanding of this correct?

Ward

iTrader: (1)

Correct -- 82-87 had v-belts, 88-92 had serpentine, on both camaro and firebird.

y84pauloflondon

Thanks Ward for clearing that up for me!

Twin_Turbo

iTrader: (25)

Actually it was a set of 3 v belts and a flat belt. Alt uses flat belt, power steering pump, ac and air pump use a v belt.

y84pauloflondon

My 87 GTA 5.7 TPI......

1 serpentine belt- Alt, water, crank
1 V belt- Crank, water, power steer, AC
1 V belt- Crank, power steer
1 V belt- Water, smog pump

Stephen

iTrader: (12)

Yep. Stock setup. Mine is all that minus 1 v-belt & the smog pump (its on the floor now)

motleykent

This is a great thread. Thanks for all of the info guys.

soileaujp

I just read this post and have had the same issue with code 36 maff burnoff relay. I bought the MR22 and the MR82 from autozone and they both are rectangular shapped. I searched and the only place i found the oval shaped maff burnoff relay and maf power relay is from the GM dealer part number 14089936 for $25. I bought it today and put it in and bingo. check engine light no longer on. Just wanted to let everyone know, If you got a code 36, go to the GM dealer and spend the $25 and save alot of time and money.

MI ROC-Z

I was just wondering soileaujp, did you clear the codes by disconnecting the battery before you installed the new relay, did you know if it was an intermittent code? Did you just plug the relay in and the light turned off? I just bought the same relay from GM today and it had made in china stamped on the top of it... not the diagram that the factory stock ones had, how about yours?

I cleared the codes by disconnecting the battery and re-installed the relay that was in there when the code showed up. I started it up a couple of times and the SES light did not come back on. I'm just beginning to wonder if its only a matter of time before the code 36 comes back.

soileaujp

Here is what happened from start to finish. hope this helps anyone who has had this issue.
1. started getting the check engine light. Code 36. The light stayed on constantly. after a few weeks of trouble shooting the issue, I disconected battery to reset it but it came right back on.
2. tried to find maf burnoff relay at autozone. They don't sell the oval relay PN 14089936. The relays they have are the rectangular 5 pin PN MR22/MR82
3. I then tracked down the right relay at GM PN 14089936 after a week of trying to find the right part number. GM also showed me that the Maf Power Relay and the Burnoff relay is listed as the same part number and are interchangeable according the the dealership service center.
4. I put in on and then started the car and the light never came back on. It is an easy fix with just buying the appropriate relay from GM.

The relay has the diagram on it. It doesnt say made in china although i am sure it was. My car sometimes would hesitate when cruising or when getting on the gas when engine was cold. Problem solved when i replaced the relay and light still off. Car running smooth like it should. On my 88 Iroc, the order of the relays from left to right goes as follows.

Left: fuel relay (rectangular shaped)
middle: Maf Power relay (oval shaped)
right: Maf Burnoff relay (oval shapped)

Hope this helps.

Chevy86 IROC-Z

iTrader: (17)

i would be very careful posting this. If there is someone new to 3rd gens or just recently bought a thirdgen, this can certainly be a nightmare. Instead, you should post the colors of the wires and the corresponding PN of the relay. When I changed my relays, I did the same thing that someone else posted. Come to find out that ALL 3 relays were switched around (middle, left, right). So I whipped out the the Haynes manual and studied the wire diagram and got everything all straightened out. But this was with my 86 which all relays are squared.

John 89 Formula

It might be easier for the folks with the older style square relays to splice in the oval connectors and use the oval relays as they are the same part number.

Chevy86 IROC-Z

iTrader: (17)

Well I got a diagram put away just in case I run into the issue again. I got all the pn"s for different relay (squared) just in case some get discontinued. My bigger plan is to cut and replace the wires that are exposed just under the connectors.

Mike92Firebird

iTrader: (3)

so helpful! I keep getting MAF burnoff code and I replaced both relays with the same part and it's driving me mad.

tpi88camaro

iTrader: (7)

Just out of curiosity, but can someone with more knowledge than I tell me why GM now uses the same relay for the MAF power/burn off when they use to be different. thanks

John 89 Formula

It's easier to repair, people will not get the relays mixed up if they're both the same.

Also, GM also used that same relay for other things like the cooling fans, and it was used in a lot of different cars, not just f-bodies, it was cheaper for them to produce one multi purpose relay than four or five different ones.

tpi88camaro

iTrader: (7)

I looked under the hood of my Iroc and low and behold it has the 14089936 relay for both MAF power and burnoff. They must have been replaced before I got the car back in '02. Learn something new everyday. lol

Chevy86 IROC-Z

iTrader: (17)

The PO must of had switched them out when Gm was producing those relays. IIRC, the MAF Relay had a resistor across the prongs, while the other relay didnt. The MAJOR differnce is that the FP relay only has 4 wires while the others have 5. I could be wrong. I dont remember off the top of my head though.

resinlake

Just a quick side comment, I dont remember if I said this all ready... if you buy a relay from Autozone and your gut tells you, uh is this a bad relay still? take it back and get another. I bought two new relays from them and one was 100% doa from the factory.

Chevy86 IROC-Z

iTrader: (17)

I bought a MAF Burn-off, MAF Sensor Relay, and FP Relay from AZ. Neither was bad. You may of had gotten a bad batch which was shipped from the factory to AutoZone. Either way,good to hear you got yours going.

resinlake

thanks, I miss my iroc, can't wait to build another, thinking L92. Loooove that engine in my truck. I miss this place

lethaldomestics

Is it possible to get the small pins that go inside the connecter to the relay

Chevy86 IROC-Z

iTrader: (17)

As in buy new pins?

TTOP350

iTrader: (8)

If your careful you can expand the factory connector, slide the outer wire casing into the connector where its supposed to be and gently recrimp it all back together.

Chevy86 IROC-Z

iTrader: (17)

Or you can extract the pins from the connector housing, heat up the crimped area with a lighter to burn the plastic inside the crimp, and then gently pull the wire away from the pin. Then to reinstall the pin to the wire, open the crimped connector, slide in the stripped clean wire and crimp. To be sure that there is a solid bond and connectivity, solder the crimped spot for a superior connection.

judoka_ca

Hey Guys I have a Camaro 87 IROC Z28 5.0 5 speed and Idid a bit of research on those relays above and some of the BW numbers seem to be reversed at the above quote post .
GM Dealer gave me this new part# for Fuel Pump 10094701 which is same part number for the Burn offn Realy. (My old relays were 14078907 for fuel pump and burn off) and 10067925 for Power, which I believe should still be the same

BW R3009 MAF burn off(GM PART#10094701) for Models up to 1987 only
BW R3009 Fuel pump(GM PART#10094701) Same for 89 and some newer models
BW R671 MAF Power(DIFFERENT RELAY than other ones)(original GM PART#10067925)

I have also check the AC Delco cataloc and it list relays as follow:

AC DELCO -X Reff. With BW

AC 212-305- FUEL PUMP - BW #3009
AC 212-305- BURN OFF - BW #3009
AC 212-300- POWER - BW #R671


I have loked here as well (might have to enter your zip code and vehicle type/year
http://www.oreillyauto.com/site/c/se...aro&vi=1035616

http://parts-catalog.acdelco.com/cat...log_search.php

I have also noted that most places will give you the wrong relay or will tell you they are all the same (but obviously they are NOT) if you don't know exactly the part number or what you're looking- for so be aware Also noted that when you research the part number on the Net you might get wrong descritpion what's the relay is for(ebay was good example for that)

I hope this help and thanks Elcam84 for the original post

RJMcEachern

good morning,
hate to revive an old thread, but for informational purposes, gmpartsgiant.com has all the relays and pigtails. i have ordered the MAF power relay, and MAF burn off relay using the OE part numbers as cross reference.

RJMcEachern

EDIT: this is for an 87 GTA 5.7L

10067925 RELAY ASM 1 10.44
10.44
10094701 RELAY ASM 1 15.15
15.15

Chevy86 IROC-Z

iTrader: (17)

fastgascar

Bringing this one back, can someone please assist. I pulled a code 36 so I started poking around the relays, I have a 1988 Chevy Iroc Z 5.7 and I have these exact colors on my relays listed in the quote, however the relay I think is the fuel pump has part # 10094701(rectangle), the other two are 14089936(round). I have the fuel pump relay out of the car and the car still starts. I disconnected all three relays and the car starts, of course the idle is rough. If the MAF power and MAF burnoff relay are supposed to be different then, why do I have two of the same. These are factory? Never been taken out of the car. The car has been in my family the last 24 years, so I know it was never swapped around.