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

94 lt1 limp mode problem

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Old Mar 2, 2010 | 04:44 PM
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94 lt1 limp mode problem

hi i dont know if im posting in the correct forum eneways i have a 94 chevy camaro with lt1 with few mods flomaster cold,air intake etc and my tranny is not down shifting or going into ovedrive every time i start the car i have first then i lose the gear once it shifts to second gear the trans never goes to first gear i already replace 4 sylenoids in the trans i also change filter and fluid i have search the web and found out my car is in limp mode please somebody help me p.s. could my opti spark do anything with limp mode?
Old Mar 2, 2010 | 05:23 PM
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Originally Posted by nuncio
hi i dont know if im posting in the correct forum eneways i have a 94 chevy camaro with lt1 with few mods flomaster cold,air intake etc and my tranny is not down shifting or going into ovedrive every time i start the car i have first then i lose the gear once it shifts to second gear the trans never goes to first gear i already replace 4 sylenoids in the trans i also change filter and fluid i have search the web and found out my car is in limp mode please somebody help me p.s. could my opti spark do anything with limp mode?
Tell us about the car, including all mods. The tell us if the check engine light is on and, if it is, what the codes are.
Old Mar 2, 2010 | 05:29 PM
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is 94 camaro with lt1 almost stock i only have a`3inch exhaust and a cold air intake and i dont have my check engine light on
Old Mar 2, 2010 | 05:31 PM
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OK, get the car scanned for any trouble codes (some don't light the check engine light). To tell the truth, it sounds like a tranny problem and not something that would involve all the sensors on the engine....
Old Mar 2, 2010 | 05:42 PM
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well i already did that and theres no comunication with my computer well i been seaching on the web and found out my computer is in limp mode this is my second computer i replaced also i also put new selinoids in the trans and car still acts the same by the way i was looking under need the hood and saw 4th of july by the opti spark because theirs a crack were the coil goes to the cap of my optispark you think that has anything to do with the computer going to limp mode ????????
Old Mar 2, 2010 | 07:22 PM
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94 z28 in limp mode

i have a 94 z28 and my computer is in limpmode the trans is not down shifting or up shifting by it self i only have 2nd and 3rd and reverse i have first went i first start the car but then the car feels slugish at take off i have to manually put in second gear to take off also it never goes on 4th gear plz someone help me is driving me nutsp.s would my opti spark have anything to do with the computer going to limp mode?????????
Old Mar 2, 2010 | 07:49 PM
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Question 4l60e in limp mode

i have a 94 camaro z28 and my tranny has lost eletrical power i have change the selenoids in my trans and change twice the fluid and also filter.went i go to drive it it doesnt shift by it self or downshifts it feels sluggish at take off because ill take off in 3rd gear i have to manually put it in second i dont have over drive i have already spend alot money in this problem could somebody pls guide me in the rigth direction and i dont have my check engine light on etheir p.s would my opti spark have anything to do with it????????
Old Mar 2, 2010 | 08:02 PM
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"Limp mode" is a condition that most people never experience. Its what the PCM does when it loses virtually all the critical data inputs. On the other hand, when certain codes set, the PCM will default to backup modes that keep the engine running, although maybe not at peak performance.

If your tranny isn't shifting, how did you come to the conclusion the PCM is in limp mode? Have you scanned it for codes? Is the SES light on? Are there any other systems that are not working, other than the trans?
Old Mar 2, 2010 | 08:12 PM
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Wrong forum... and DO NOT CROSS-POST. You do not need to post the same problem in three separate forums. Post once, in the correct forum.

I'm going to attempt to merge these three post in a single thread on the Drivetrain forum. I'd much rather have spent the time trying to help you (already asked you some questions on the "General 67-02 F-Body Tech" forum), but I guess I'll have to spend the time merging threads.
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