Your email came through, and actually I send an email wondering if the
problem might not be exactly what you described. Thanks Fletch!
On Mon, Apr 30, 2018 at 4:48 PM, Fletcher James <[log in to unmask]> wrote:
> I've never replied to one of these before so hopefully this works.
> I had similar problems with my 95, ~89k miles. Would have really weird
> sometimes non existent throttle response at just light throttle cruising.
> Progressed into dying a couple of times when coming to a stop. Also when
> warming up as it was crossing into closed loop would stutter and idle
> Decided it was a good time to dig into the valley and do all the normal
> stuff in there as I've never done it and I could at least take all of that
> out of the equation, cleaned drain, new coils, all connections good, Haibeck
> chip, no more secondaries, new wires, plugs, injector housing gaskets and o
> This didn't change anything. Had also ordered new O2 sensors. Replaced the
> passenger side. Was not able to get the driver's side to budge and no real
> room to get any type of good leverage up in there. She runs 90% better with
> just the passenger side replaced. Still just a little idle stumble as the
> coolant reaches about 120 degrees.
> On Mon, Apr 30, 2018, 14:14 Marc Randolph <[log in to unmask]> wrote:
>> Howdy all,
>> I'll start with my questions, then provide the back-story:
>> 1. What are people using as a modern Diacom replacement? modern PC or
>> Android preferred. Real-time graphing capability would nice, but the
>> main point is logging, possibly graphing it later.
>> 2. Any ideas on what might cause a surging problem that goes away
>> AFTER the ignition is cycled when the car is fully warmed up?
>> With my daughter now of driving age, I've loaned my daily driver to
>> her and have started driving the ZR-1 every day. And yes, she's asked
>> multiple times if she can drive it to school (or anywhere) by herself
>> - looks like I've created a monster by making her learn to drive a
>> Anyway, 2 months ago it started driving worse. I found several
>> injectors were bad, so I replaced them all. That mostly fixed the
>> problem, but I had introduced two new ones. I pulled the plenum again
>> and found where (on the previous pull) I had broken a brittle vacuum
>> hose and somehow loosened a plug wire from its coil. So fixed all
>> that and now it ran good. Ended up replacing spark plugs also.
>> So... new plugs and new primary injectors and it runs like a top for a
>> month or two. Last week, in the middle of the drive to work, it
>> started mildly surging. During light throttle (to maintain speed...
>> RPM's in the 1500 to 2000 range), it would feel like it's losing
>> power, than suddenly it's not, then losing, then not. At a stop, the
>> idle sometimes (but not always) wanders from the normal 675 RPM up to
>> 1000 RPM - and sometimes as high as 1200 RPM. It seems to get worse
>> as the car is warming up, so I'm imagining all kinds of things. I
>> pull over and turn the car off - don't see or smell anything weird.
>> So I fire it back up, and .... the problems are gone.
>> I've repeated this several times now and it's pretty consistent - when
>> the problem starts occurring, I can cycle the ignition and the problem
>> goes away... ASSUMING the car has been running long enough. And once
>> it's gone, it stays gone until it cools way down. Not sure what the
>> threshold is yet (hence the need for a Diacom-like software).
>> Good ol'dad suggested he's had a similar behavior on a different car
>> with a bad temperature sensor. But those seem to be functioning
>> properly. I do wonder about the O2 sensors though...
>> Idle speculation welcome!
>> TOPICS: TECH or SALOON
>> Problems? Contact ZR1Mom at: [log in to unmask]
>> ZR-1 Store @ http://www.zr1net.net
>> ZR-1 Saloon Keeper
TOPICS: TECH or SALOON
Problems? Contact ZR1Mom at: [log in to unmask]
ZR-1 Store @ http://www.zr1net.net
ZR-1 Saloon Keeper