'87 2.5 4 cyl backfire

It's called either:

An Air charge temperature sensor, Inlet Air temperature sensor.

It's in the book under one those names, or something close.

Refinish King


"gordonu" <gordonu@earthlink.net> wrote in message
news:C6HNc.844$9Y6.565@newsread1.news.pas.earthlin k.net...
> Hi:
>
> I have an '87 SE 2.5 and have something you may check. Attached to the
> air cleaner is a sensor and a cable connects to that sensor. If the
> connection is intermittent, it can cause the problem that you describe.
> In my case, I was able to clean the contacts by removing and replacing
> the cable, then - magic- the engine run great.
>
> I have a California car, and so far have been unable to replace that
> sensor since it is not in the parts manuals at auto stores. I have had
> the car for 12 years and it still runs great. Good luck!
>
> Chris B wrote:
> > I'm havin trouble. My fiero was sittin for a few months and recently I
put
> > it back on the road. Anyways, It was driving fine, but now it's
backfiring
> > during acceleration. I've checked the plug wires, O2 sensor, EGR, but I
> > really don't have a clue what's goin on. It runs fine under high RPM
> > driving, but if I go to punch it it starts to backfire and as is it's
> > missing or something. It's backfiring out of the carb too. Anyone have
any
> > clue what's goin on?
> >
> >
>

The Intake Air Temperature (IAT) sensor is in the intake manifold
on the L4 cars. The only sensor attached to the air filter housing
is the MAP sensor (Manifold Absolute Pressure) and it is critical
to the engine running right. The MAP sensor has a 4-wire connector,
the IAT sensor has a two wire connector.

JazzMan

Refinish King wrote:
>
> It's called either:
>
> An Air charge temperature sensor, Inlet Air temperature sensor.
>
> It's in the book under one those names, or something close.
>
> Refinish King
>
> "gordonu" <gordonu@earthlink.net> wrote in message
> news:C6HNc.844$9Y6.565@newsread1.news.pas.earthlin k.net...
> > Hi:
> >
> > I have an '87 SE 2.5 and have something you may check. Attached to the
> > air cleaner is a sensor and a cable connects to that sensor. If the
> > connection is intermittent, it can cause the problem that you describe.
> > In my case, I was able to clean the contacts by removing and replacing
> > the cable, then - magic- the engine run great.
> >
> > I have a California car, and so far have been unable to replace that
> > sensor since it is not in the parts manuals at auto stores. I have had
> > the car for 12 years and it still runs great. Good luck!
> >
> > Chris B wrote:
> > > I'm havin trouble. My fiero was sittin for a few months and recently I
> put
> > > it back on the road. Anyways, It was driving fine, but now it's
> backfiring
> > > during acceleration. I've checked the plug wires, O2 sensor, EGR, but I
> > > really don't have a clue what's goin on. It runs fine under high RPM
> > > driving, but if I go to punch it it starts to backfire and as is it's
> > > missing or something. It's backfiring out of the carb too. Anyone have
> any
> > > clue what's goin on?
> > >
> > >
> >

--
************************************************** ********
Please reply to jsavage"at"airmaet.
et.
Curse those darned bulk e-mailers!
************************************************** ********
"Rats and roaches live by competition under the laws of
supply and demand. It is the privilege of human beings to
live under the laws of justice and mercy." - Wendell Berry
************************************************** ********

You're right:

Shows you how long I haven't worked on one?

Refinish King


"JazzMan" <No_Spam@airmail.net> wrote in message
news:41086A7D.250D@airmail.net...
> The Intake Air Temperature (IAT) sensor is in the intake manifold
> on the L4 cars. The only sensor attached to the air filter housing
> is the MAP sensor (Manifold Absolute Pressure) and it is critical
> to the engine running right. The MAP sensor has a 4-wire connector,
> the IAT sensor has a two wire connector.
>
> JazzMan
>
> Refinish King wrote:
> >
> > It's called either:
> >
> > An Air charge temperature sensor, Inlet Air temperature sensor.
> >
> > It's in the book under one those names, or something close.
> >
> > Refinish King
> >
> > "gordonu" <gordonu@earthlink.net> wrote in message
> > news:C6HNc.844$9Y6.565@newsread1.news.pas.earthlin k.net...
> > > Hi:
> > >
> > > I have an '87 SE 2.5 and have something you may check. Attached to
the
> > > air cleaner is a sensor and a cable connects to that sensor. If the
> > > connection is intermittent, it can cause the problem that you
describe.
> > > In my case, I was able to clean the contacts by removing and
replacing
> > > the cable, then - magic- the engine run great.
> > >
> > > I have a California car, and so far have been unable to replace that
> > > sensor since it is not in the parts manuals at auto stores. I have
had
> > > the car for 12 years and it still runs great. Good luck!
> > >
> > > Chris B wrote:
> > > > I'm havin trouble. My fiero was sittin for a few months and
recently I
> > put
> > > > it back on the road. Anyways, It was driving fine, but now it's
> > backfiring
> > > > during acceleration. I've checked the plug wires, O2 sensor, EGR,
but I
> > > > really don't have a clue what's goin on. It runs fine under high
RPM
> > > > driving, but if I go to punch it it starts to backfire and as is
it's
> > > > missing or something. It's backfiring out of the carb too. Anyone
have
> > any
> > > > clue what's goin on?
> > > >
> > > >
> > >
>
> --
> ************************************************** ********
> Please reply to jsavage"at"airmail.net.
> Curse those darned bulk e-mailers!
> ************************************************** ********
> "Rats and roaches live by competition under the laws of
> supply and demand. It is the privilege of human beings to
> live under the laws of justice and mercy." - Wendell Berry
> ************************************************** ********

> The Intake Air Temperature (IAT) sensor is in the intake manifold
> on the L4 cars. The only sensor attached to the air filter housing
> is the MAP sensor (Manifold Absolute Pressure) and it is critical
> to the engine running right. The MAP sensor has a 4-wire connector,
> the IAT sensor has a two wire connector.

Actually, I think that is a 3 wire connector...
--
Robert W. Hughes (Bob)
BackYard Engineering
29:40.237N, 95:28.726W or perhaps 30:55.265N, 95:20.590W
Houston, Texas "The city with too much Oxygen"
rwhughe@oplink.net

Robert W Hughes wrote:
>
> > The Intake Air Temperature (IAT) sensor is in the intake manifold
> > on the L4 cars. The only sensor attached to the air filter housing
> > is the MAP sensor (Manifold Absolute Pressure) and it is critical
> > to the engine running right. The MAP sensor has a 4-wire connector,
> > the IAT sensor has a two wire connector.
>
> Actually, I think that is a 3 wire connector...

Actually, you're right!

JazzMan

--
************************************************** ********
Please reply to jsavage"at"airmail.net.
Curse those darned bulk e-mailers!
************************************************** ********
"Rats and roaches live by competition under the laws of
supply and demand. It is the privilege of human beings to
live under the laws of justice and mercy." - Wendell Berry
************************************************** ********

Sounds like it's about time to check:

The timing chain or gears, pull the rocker cover, see if any push rods
pushed through the rocker arms, or if the rocker arm wore and is lose.

Get back to me, you'll need a book to check the cam gear or timing chain
alignment.

Refinish King

PS
Have you checked for a blocked catalytic converter?


"Chris" <cbabchuk@globallivinngspace.com> wrote in message
news2BPc.160535$od7.23160@pd7tw3no...
> It's still backfiring. I changed the MAT sensor and the Ignition
control
> module......
>
> "JazzMan" <No_Spam@airmail.net> wrote in message
> news:4109900C.6F74@airmail.net...
> > Robert W Hughes wrote:
> > >
> > > > The Intake Air Temperature (IAT) sensor is in the intake manifold
> > > > on the L4 cars. The only sensor attached to the air filter housing
> > > > is the MAP sensor (Manifold Absolute Pressure) and it is critical
> > > > to the engine running right. The MAP sensor has a 4-wire connector,
> > > > the IAT sensor has a two wire connector.
> > >
> > > Actually, I think that is a 3 wire connector...
> >
> > Actually, you're right!
> >
> > JazzMan
> >
> > --
> > ************************************************** ********
> > Please reply to jsavage"at"airmail.net.
> > Curse those darned bulk e-mailers!
> > ************************************************** ********
> > "Rats and roaches live by competition under the laws of
> > supply and demand. It is the privilege of human beings to
> > live under the laws of justice and mercy." - Wendell Berry
> > ************************************************** ********
>
>