dove@mit-bug.UUCP (Web Dove) (10/25/85)
References: My accord behaves very poorly on cold wet days. When you apply the gas it first accelerates then almost dies then accelerates ... . This stops after it warms up. Stomping on the gas doesn't help. The car has been recently "tuned" (plugs, filters) to no avail. I just put in some gumout. No results yet. What I wonder is: 1) are others experiencing this? 2) is there a potential leakage problem in the 10^6 vacuum hoses due to age? (I'd hate to have to check that out!)
rjs@hpfcla.UUCP (11/01/85)
>My accord behaves very poorly on cold wet days. When you apply the gas >it first accelerates then almost dies then accelerates ... . This stops >after it warms up. Sounds like an electrical problem. You are probably getting moisture in your distributor cap. You may want to get a new set of plug wires and a new distributor cap. Second thing to check is that the automatic choke is functioning properly. If this were the cause I would expect the symptoms to occur on any cold day (not just wet ones). Bob Schneider ihnp4!hpfcla!hpfcll!rjs
ksbszabo@watvlsi.UUCP (Kevin Szabo) (11/01/85)
In article <401@mit-bug.UUCP> dove@mit-bugs-bunny.UUCP (Web Dove) writes: >My accord behaves very poorly on cold wet days. When you apply the gas >it first accelerates then almost dies then accelerates ... . This stops >after it warms up. > Do they use salt on your roads in the winter? If so, you might have lost the small intake air heater which sits over the exhaust manifold. It seems that the engine/carb is very sensitive to the inlet air temp. My wife's 79 Honda was acting terrible in cold weather until we had it replaced. This small piece of sheet metal sits right at the front of the engine and gets the full force of winter's corrosion thrown at it. They use lots of salt in southern Ontario. I have also heard of temperature sensors going bad in the carb, but I don't remember which particular one was the culprit. Kevin -- Kevin Szabo' watmath!watvlsi!ksbszabo (U of W VLSI Group, Waterloo, Ont, Canada)
z@rocksvax.UUCP (11/06/85)
Almost correct. There are a couple of thermal sensitive systems that come
into play on the Accord engine. This is from the `79 service manual:
- Automatic Choke
-
- Description
-
- The automatic choke mechanism is designed to control both the choke valve
- setting and the fast idle position during warmup.
-
- The mechanism consists of a bimetalic coil spring, heater, thermistor,
- intake air sensor and external resistor. ...
-
- Operation
-
- Whenever the engine is running, there is a voltage to the electric heater unit,
- which results in the heating of the bimetal coil.
-
- As the bimetal coil warms, it unwinds and open the choke valve. The amount
- of choke opening is determined by the temperature of the heater, which in turn
- is affected by the ambient temperature at the thermistor.
-
-
- Fast Idle Unloader
-
- ... When the engine coolant temperature exceeds the set temperature of the
- ignition timing thermosensor, the unloader solenoid valve in the emission
- control box is switched "OFF", allowing the manifold vacuum to operate on the
- fast idle unloader.
-
end quotes from service manual section 17 (Fuel System)
What this means is if your car doesn't maintain a high-idle when cold then
you have problems with the fast-idle system (probably the sensor). Check
to make sure it is plugged in! It is on the right side of the engine near
plugs. If the car runs lousy even at a high idle the there is probably
problems with auto-choke.
Other things mechanics seems to do... Check to make sure your igniter
(electronic ignition) is plugged in. Also make sure your distributor
is tight. Various shops have left my thermosensor and igniter
unplugged along with leaving the distributor loose! Boy does that
screw your performance. For you in the Rochester area: beware of
Holtz!
//Z\\
James M. Ziobro
Ziobro.Henr@Xerox.ARPA
{rochester,amd,sunybcs,ihnp4}!rocksvax!z