1999 tahoe misfire on cylinder 8 after having new spider injector/pressure regulator replaced

pedub · May 14, 2024

Hello all, Had spider injector/ regulator replaced now throws a misfire on cylinder 8 and falls on its face when you boot it down, rough idle, looks like unburned fuel out the tail pipe, Never did any of this before I brought it to him, I brought it in because of bad fuel pressure regulator, (hard stating after sitting a while, did a pressure check and it failed) so I bought a ac/delco spider/reg and had this guy put it in and then the problem started. guys being a ass h&^* and says my part was bad (******** I don't believe it) anyway I think his mechanic maybe got 2 injectors crossed, he said that if that were true, I would have 2 codes? any truth to that? he blamed it on the new part I brought him, I will never do that again(bring the part) I was going to do it myself (wished I would have) but a friend recommended this guy and it was cheap $350 any help would be great . trying not to go to jail (this guy has a mouth on him) thanks'

strutaeng · May 14, 2024

You would probably have 2 misfire codes if injectors were reversed, I think.

I mean, any new part can be faulty even before you open the box. Why don't you ask him to recheck the fuel pressure? If the new assembly is bad, the fuel pressure would drop I'm guessing?

This is why mechanics don't like customers bringing their parts, yes.

exp500 · May 15, 2024

What are your steady state cruise fuel trims? What are your Fuel Pressures? Key on eng off, idle, cruise.

pedub · May 17, 2024

I Don't Know what the trims are, they still have my truck, I did talk to the kid that worked on it, he said he had a hard time getting the old injector body off of the upper manifold and had to use emery cloth on it to get the new one on, do you think it could be leaking now causing the misfire on 8 ? Thanks

exp500 · May 17, 2024

Suspect fuel pump.

dria · 2024-10-30T16:02:10-0400

pedub said:
Hello all, Had spider injector/ regulator replaced now throws a misfire on cylinder 8 and falls on its face when you boot it down, rough idle, looks like unburned fuel out the tail pipe, Never did any of this before I brought it to him, I brought it in because of bad fuel pressure regulator, (hard stating after sitting a while, did a pressure check and it failed) so I bought a ac/delco spider/reg and had this guy put it in and then the problem started. guys being a ass h&^* and says my part was bad (******** I don't believe it) anyway I think his mechanic maybe got 2 injectors crossed, he said that if that were true, I would have 2 codes? any truth to that? he blamed it on the new part I brought him, I will never do that again(bring the part) I was going to do it myself (wished I would have) but a friend recommended this guy and it was cheap $350 any help would be great . trying not to go to jail (this guy has a mouth on him) thanks'

I just had this happen on my 99' Yukon. Replaced spider injector and then misfire on cylinder 8 - loses pressure, spilling fuel... was it ultimately your spider injector was faulty or something else? Thank you for getting back to me on this

1999 tahoe misfire on cylinder 8 after having new spider injector/pressure regulator replaced

pedub

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strutaeng

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exp500

Full Access Member

pedub

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exp500

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dria

TYF Newbie

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