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Subject:
Re: L98 vs LT1
From: "ROBERT S AMP BA Drake" <robtsdrake(at)verizon.net>
Subject: Re: L98 vs LT1
Lines: 61
Date: Mon, 17 Jan 2005 14:20:55 GMT
NNTP-Posting-Host: 70.18.226.165
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ABSOLUTELY -- the LT1 had many improvements, cooling, power, reliability.
The only down side to the 92-93 LT1s is the potential for the water pump to
leak onto the opti-spark. 94 and up fixed that. Just make sure there is NO
water under the water pump when you buy the car.
I changed the water pump on my 92 at about 88,000 miles because it was
leaking onto the serpentine belt and spraying a little water out the side of
the car. The recommendation is to replace the opti-spark at that time and
get the update. I ignored that, covered the opti-spark VERY WELL and
replaced the pump. 130,000 and no problem.
I would spring for a 94, depending on price difference and what you want to
pay. 92s are a bargain.
"Bob G." <rg327_remove_(at)adelphia.net> wrote in message
news:muldt094ja5kc9lc8ikg0v5stj64q85680(at)4ax.com...
> On Sat, 01 Jan 2005 15:12:37 GMT, bigfeet <bigfeet(at)hvc.rr.com> wrote:
>
>>Hi all. I am looking to buy my first vette. I would like to know if
>>anyone has driven a 91 and a 92 and could tell me if it is worth the
>>extra money for the newer engine.
>>
>>Thanks,
>>Al
> ======================
> A lot of us had those same questions when we were looking for C4`s
>
> My advice would be to find the "your" perfect car then worry about the
> engine...
>
> From my "tests"... lol
>
> The L98 "feels" stronger off the line... but it runs out of breath
> pretty quick....and you can feel it. stop breathing.
>
> The LT1 on the other hand sees to be a little weaker off the
> line...but it can breath well even at higher rpms...so the car "pulls"
> a lot stronger then the L98...
>
> The LT4 engine is a winner in my opinion...Honest it felt stronger
> then any of the LS1`s I drove but I could not find a 96 that I liked
> at the price I wanted to pay...(same old story)
>
> I ended up (back in 1998 with a Black on Black 6 so 95) with an LT1
> engine, and I have absolutely no compaints...except that it was not an
> LT4 or a Grand Sport....
>
> Glad you are looking to buy your 1st Corvette....I bet it will not be
> your last
>
> Bob Griffiths
> 68 SS 396 Chevelle
> 64 & 72 Corvette Conv.s
> 76 79 & 95 Corvette Coupes
>
>
>
>
>
From: "Dave Gee" <davelgee(at)hotmail.com>
Subject: L98: starts, but won`t keep running.
Date: 17 Oct 2005 15:54:47 -0700
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NNTP-Posting-Host: 4.240.240.97
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Hi group:
I have an 89 L98 conv. I am having a problem with it, first thing in
the morning it will start, rev up to about 12-1500 rpm and then idle
down and die. It will not restart after this unless let sit for 5 or
10 mins. then it will repeat the performance.
No codes are shown, and it is getting spark, even when not starting.
The fuel rails are pressurized (not sure how much pressure) It seems
like the injectors are not putting out gas or perhaps the throttle
position is unknown?
Trying to get it to keep running with the throttle on the initial
start just kills it, I suspect something to do with not getting enough
fuel in the mixture.
Anyone experience a similar problem or have any ideas on how to
diagnose this further?
TIA
Dave G.
From: PJ <pj4380(at)yahoo.com>
Subject: Re: L98: starts, but won`t keep running.
Lines: 43
Date: Mon, 17 Oct 2005 20:29:51 -0700
NNTP-Posting-Host: 68.6.135.254
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Dave Gee wrote:
> Hi group:
>
> I have an 89 L98 conv. I am having a problem with it, first thing in
> the morning it will start, rev up to about 12-1500 rpm and then idle
> down and die. It will not restart after this unless let sit for 5 or
> 10 mins. then it will repeat the performance.
> No codes are shown, and it is getting spark, even when not starting.
> The fuel rails are pressurized (not sure how much pressure) It seems
> like the injectors are not putting out gas or perhaps the throttle
> position is unknown?
> Trying to get it to keep running with the throttle on the initial
> start just kills it, I suspect something to do with not getting enough
> fuel in the mixture.
> Anyone experience a similar problem or have any ideas on how to
> diagnose this further?
>
>
> TIA
> Dave G.
>
The shop manual (Section 6E) and a pressure gauge will save you time and
a bundle of dollars throwing parts at an unknown problem. Without codes
though even that won`t be easy.
Gentle throttle tends to rule out an idle air circuit failing to open.
Since you know spark is OK then its time to figure out what`s happening
first. Is the fuel pump shutting down or the injectors all shutting off
with plenty of pressure on the rail.
If the engine runs for 2 seconds and then dies of fuel starvation, it
could be failure of the ECM to receive a pulse train from the
distributor --that will shut down the injectors. I`ve seen that in a
350tpi Camaro. That could be a broken wire from the distributor to the
ECM or a bad distributor module.
You might also pull the vacuum line on the fuel pressure regulator and
see if there`s gasoline leaking from the wet side to the vacuum side.
Best to get out the book.
PJ
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