LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Bogging at over 1/2 thottle

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Old May 17, 2003 | 09:39 PM
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Bogging at over 1/2 thottle

Ok when I get over 1/2 thottle or so once the engine is hot it bogs. If I keep it at over 2500 or so say in second it seems like its got a miss, not bad, but a slight miss. Also the tranny doesnt always wanna shift right when these problems are going on. I was having these issues before and after I swapped the computer over to a pcm4less one.

does it seem like the TPS is bad? I have a new harness, knock, MAF, MAP,ECT,plugs , wires, optispark,19 pound injectors(I know they need to go), and O2s
Old May 18, 2003 | 02:17 AM
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somebody?
Old May 18, 2003 | 04:17 AM
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Don't mean to jump in on your thread but what is bogging exactly? Sounds like I have the same problem.
Old May 18, 2003 | 09:37 AM
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bogging is when the motor doesnt keep accelerating when you give it gas. As fas as the the other stuff , I dont know. The opti , plugs, wires, and coil are all new.I tested the ohms on the wires and unhooked the MSD 6A and ran the coil straight
Old May 18, 2003 | 02:05 PM
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well i wanna do some NKGs in there but I dont feel like pulling the right side header completely off to do so ,but it warped and leaking so i do need to replace it
Old May 18, 2003 | 03:59 PM
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Originally posted by 94FlamdS10Blazr
bogging is when the motor doesnt keep accelerating when you give it gas. As fas as the the other stuff , I dont know. The opti , plugs, wires, and coil are all new.I tested the ohms on the wires and unhooked the MSD 6A and ran the coil straight
Would bogging only happen at certain speeds?
Old May 19, 2003 | 01:29 AM
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not really, more like just at running temp at around 3,000 rpms or over 1/2 thottle. I went to a crawfish party today hoping it would make it, nope! I got a few miles from it and it started dying out so much I couldnt get it into 2nd cuz I couldnt get it high enuff in the revs for the stall to shift. I pulled in a lot and started to roll up the windows and it died. It restarted as soon as I tried no problem, but I couldnt rev it at all due to it missing and sputtering.
I came back afterwards and it started right up and I drove it home. No pronblems till I turned onto my street. Lucky me its only 5 house to mine. BTW this was at 7pm so it wasnt as hot as normal like it was when I drove there
Old May 19, 2003 | 01:39 AM
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I would get bigger injectors and a check your fuel filter and fuel pressure. I had a problem with the motor stumbling when I would push the gas to fast. The car would also just stall out at lights (rarely), run rough at low speeds, and had hard starts. The problem turned out to be my fuel pump, I changed to a Walbro 255 lph, now the car runs and starts perfectly. Just something to check into, good luck.
Old May 19, 2003 | 02:08 AM
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im waiting on the injectors to come in from Brain at PCM. I hope they will be here tommorrow! I just replaced the fuel pump, strainer, and filter last week. The stock 24s were really really bad and looked like somebody had taken a dump and smeared it in them.

where can I get that pump, Walbro, from? and do you think itll fit a Blazer, Caprice, roadmaster, or Impala's tank? I dont have a camaro so the pump might be a problem. I do have the same pump in it that they put in the above mentioned cars and all the lines are the same. Its getting good pressure last time I check but the problems were there before the pump died.
Old May 19, 2003 | 10:01 AM
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im surprised nobody has said the optispark yet! thats what im starting to think
Old May 19, 2003 | 06:32 PM
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ok I just replaced that right side O2 and checked the wiring while I was there but no burns or cutting issues there. I also got the 24 pounders from Brian and swapped those. It still sputters and dies after it gets hot and stays there for a few minutes.


What can I do?
Im swapping the old optispark back in tommorrow, or should I do the first new one I got which I still have. the original is 52k old. While Im there how much is a water pump for us?
also how much and where can I get a good pump like a Walbro? or other suggestions

Last edited by 94FlamdS10Blazr; May 19, 2003 at 06:34 PM.
Old May 19, 2003 | 11:29 PM
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im swapping the optispark tonight to try it. Dam I need a Honda, or Toyota
Old May 20, 2003 | 09:14 AM
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thanks , can I get some intelligent help here?
Old May 20, 2003 | 09:25 AM
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I had a problem last year with my car where it would bog if I launched hard, but if I feathered it off the line it would not. I ended up having a vacuum leak, there was a hole in the line coming from the PCV. Fixing this took away the bog totally.
Old May 20, 2003 | 09:31 AM
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yeah but that wont solve the fact that its dying on me after it gets hot. I can restart it right after that but its still dying



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