Recent content by 1998OBS
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P0300 won’t go away!!!
Hey guys, I didn’t want to leave anyone hanging. I figured out what my P0300 problem was, it was a performance chip/computer someone added onto the truck before me. I removed it and it runs like a BRAND NEW TRUCK.- 1998OBS
- Post #49
- Forum: Engine Performance + Maintenance
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1998 Chevy 1500 random misfire
I didn’t want to leave you guys hanging, although it might not be your case I found my P0300 solution, P0300 solved ended up being a performance chip someone added to the truck that was malfunctioning, took it off and it’s a brand new truck!- 1998OBS
- Post #10
- Forum: Engine Performance + Maintenance
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1998 Chevy 1500 random misfire
What was it? I’ve changed everything you can think of short of the entire engine… I can’t find my P0300… Check my post for readings. Anything helps *shakes plastic cup of knowledge coins- 1998OBS
- Post #6
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
- 1998OBS
- Post #44
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
Bolt flange, where the EGR has the bolt go through on the driver side it cracked on install but I didn’t catch it. Either way it’s not pulling any carb spray in when I tested to see if it was pulling any air in as in a vacuum leak, obviously I’ll still replace it. Just tired of throwing money at...- 1998OBS
- Post #43
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
I went and picked up a new EGR because it has the original one, rather than cleaning it and guessing I just figured ‘before it DOES go out’ if it ever did or if it is… Installed it, while torquing down the bolts the ear on one side where the bolt goes through snapped off in two… Not a good...- 1998OBS
- Post #41
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
1. I need to get a legit scanner back on it first. 2. It’s the original MAP sensor, I can’t take live readings, I’ll have to wait until tomorrow. 3. No idea because it was unexpected and I wasn’t scanning it when it happened. 4. I’ll have to throw my OE filter back on and see if that makes a...- 1998OBS
- Post #39
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
Update: So I have a P0300 code still and I’ve been pulling my hair out, as I sit, my hands are raw and sliced up here and there… I JUST got back inside from a 40 minute test drive and have the same symptoms as before, I just spent 3.5 hours to take the manifold off, replaced the spider...- 1998OBS
- Post #37
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
Here’s the new after today: After hooking it up to a legit tester I’m getting cylinders 7 & 8 misfiring simultaneously which is weird because they’re on opposite sides of the block. Their numbers in misfire go up simultaneously… I ran compression tests on cylinders 7 & 8 and they’re both...- 1998OBS
- Post #36
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
- 1998OBS
- Post #35
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
Just did a compression test on cylinders 7 & 8 (both are misfiring) 110psi max on both- 1998OBS
- Post #33
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
This is a scan through of the engine data, I don’t know what I’m looking at I’m hoping someone see’s something I don’t. It’s yard to see I apologize but it’s 7 & 8 misfiring and then the rest of the data…- 1998OBS
- Post #31
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
Here’s some new: I connected a scan tool to it and found out that cylinders 7 & 8 are both misfiring simultaneously. I don’t know how to read the rest of the info but here it all is for anyone who’s more familiar with it. I did find a vacuum leak at the EGR valve and corrected it, not misfiring...- 1998OBS
- Post #30
- Forum: Engine Performance + Maintenance
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P0300 won’t go away!!!
Just an update: I won’t leave anyone following this post in the dark, once I figure this out I’ll definitely post what it was… Right now I’m throwing: -P0300 multiple random misfire -P0155 O2 sensor heater element- 1998OBS
- Post #27
- Forum: Engine Performance + Maintenance
