93 Grand Cherokee-Won't Start in Cold
 

Hi all.
Hope to find some suggestions here.
93 Grand Cherokee Laredo, 6 cyl, auto, 4wd, air etc. Has 220,000+ miles, been excellent and still is.
Problem is when the temp gets into the 30's, it will crank and crank, give a huff or two like it's trying to start, but no go. New plugs, wires, Oxy sensor, other things over the last couple years.
Read a forum message somewhere on a similar problem and the fellow said he finally took off the ECM and heated it in the oven. Seemed it had a crack in the insulating material that let moisture get in and freeze. Or something like that.
Possible related symptom; the engine, when running well, gives a 'miss' on acceleration at right around 2800 rpm and has for years. I've gone through most everything but am really suspect of the MAP sensor or the ECM now.
I've had a lamp on under the hood for overnight, but no help to start today. I would appreciate any ideas or suggestions for this old beauty.
Thank you.

Re: 93 Grand Cherokee-Won't Start in Cold
 

Update to this problem.
I got a can of starter fluid and tried it. The car seemed much more willing to start, but still no joy. It did huff a lot more, but didn't actually start. In my view, this points to more of a fuel problem than electrical? If there's concurrence on that, what in the fuel control system would be so subject to the cold temperature?
Would appreciate additional thoughts. Thanks.
"D" <dpfer@r.com> wrote in message news:OxKzb.105969$Eq1.40720@twister.rdc-kc.rr.com...
Hi all.
Hope to find some suggestions here.
93 Grand Cherokee Laredo, 6 cyl, auto, 4wd, air etc. Has 220,000+ miles, been excellent and still is.
Problem is when the temp gets into the 30's, it will crank and crank, give a huff or two like it's trying to start, but no go. New plugs, wires, Oxy sensor, other things over the last couple years.
Read a forum message somewhere on a similar problem and the fellow said he finally took off the ECM and heated it in the oven. Seemed it had a crack in the insulating material that let moisture get in and freeze. Or something like that.
Possible related symptom; the engine, when running well, gives a 'miss' on acceleration at right around 2800 rpm and has for years. I've gone through most everything but am really suspect of the MAP sensor or the ECM now.
I've had a lamp on under the hood for overnight, but no help to start today. I would appreciate any ideas or suggestions for this old beauty.
Thank you.

Re: 93 Grand Cherokee-Won't Start in Cold
 

Update to this problem.
I got a can of starter fluid and tried it. The car seemed much more willing to start, but still no joy. It did huff a lot more, but didn't actually start. In my view, this points to more of a fuel problem than electrical? If there's concurrence on that, what in the fuel control system would be so subject to the cold temperature?
Would appreciate additional thoughts. Thanks.
"D" <dpfer@r.com> wrote in message news:OxKzb.105969$Eq1.40720@twister.rdc-kc.rr.com...
Hi all.
Hope to find some suggestions here.
93 Grand Cherokee Laredo, 6 cyl, auto, 4wd, air etc. Has 220,000+ miles, been excellent and still is.
Problem is when the temp gets into the 30's, it will crank and crank, give a huff or two like it's trying to start, but no go. New plugs, wires, Oxy sensor, other things over the last couple years.
Read a forum message somewhere on a similar problem and the fellow said he finally took off the ECM and heated it in the oven. Seemed it had a crack in the insulating material that let moisture get in and freeze. Or something like that.
Possible related symptom; the engine, when running well, gives a 'miss' on acceleration at right around 2800 rpm and has for years. I've gone through most everything but am really suspect of the MAP sensor or the ECM now.
I've had a lamp on under the hood for overnight, but no help to start today. I would appreciate any ideas or suggestions for this old beauty.
Thank you.

Re: 93 Grand Cherokee-Won't Start in Cold
 

Update to this problem.
I got a can of starter fluid and tried it. The car seemed much more willing to start, but still no joy. It did huff a lot more, but didn't actually start. In my view, this points to more of a fuel problem than electrical? If there's concurrence on that, what in the fuel control system would be so subject to the cold temperature?
Would appreciate additional thoughts. Thanks.
"D" <dpfer@r.com> wrote in message news:OxKzb.105969$Eq1.40720@twister.rdc-kc.rr.com...
Hi all.
Hope to find some suggestions here.
93 Grand Cherokee Laredo, 6 cyl, auto, 4wd, air etc. Has 220,000+ miles, been excellent and still is.
Problem is when the temp gets into the 30's, it will crank and crank, give a huff or two like it's trying to start, but no go. New plugs, wires, Oxy sensor, other things over the last couple years.
Read a forum message somewhere on a similar problem and the fellow said he finally took off the ECM and heated it in the oven. Seemed it had a crack in the insulating material that let moisture get in and freeze. Or something like that.
Possible related symptom; the engine, when running well, gives a 'miss' on acceleration at right around 2800 rpm and has for years. I've gone through most everything but am really suspect of the MAP sensor or the ECM now.
I've had a lamp on under the hood for overnight, but no help to start today. I would appreciate any ideas or suggestions for this old beauty.
Thank you.

Re: 93 Grand Cherokee-Won't Start in Cold
 

Man o Man, Other than an old diesel farm tractor, I wouldn't
use starter fluid for anything.

D wrote:

> Update to this problem.
> I got a can of starter fluid and tried it. The car seemed much more
> willing to start, but still no joy. It did huff a lot more, but didn't
> actually start. In my view, this points to more of a fuel problem than
> electrical? If there's concurrence on that, what in the fuel control
> system would be so subject to the cold temperature?
> Would appreciate additional thoughts. Thanks.
>
> "D" <dpfer@r.com <mailto:dpfer@r.com>> wrote in message
> news:OxKzb.105969$Eq1.40720@twister.rdc-kc.rr.com...
> Hi all.
> Hope to find some suggestions here.
> 93 Grand Cherokee Laredo, 6 cyl, auto, 4wd, air etc. Has 220,000+
> miles, been excellent and still is.
> Problem is when the temp gets into the 30's, it will crank and
> crank, give a huff or two like it's trying to start, but no go. New
> plugs, wires, Oxy sensor, other things over the last couple years.
> Read a forum message somewhere on a similar problem and the fellow
> said he finally took off the ECM and heated it in the oven. Seemed
> it had a crack in the insulating material that let moisture get in
> and freeze. Or something like that.
> Possible related symptom; the engine, when running well, gives a
> 'miss' on acceleration at right around 2800 rpm and has for years.
> I've gone through most everything but am really suspect of the MAP
> sensor or the ECM now.
> I've had a lamp on under the hood for overnight, but no help to
> start today. I would appreciate any ideas or suggestions for this
> old beauty.
> Thank you.

Re: 93 Grand Cherokee-Won't Start in Cold
 

Man o Man, Other than an old diesel farm tractor, I wouldn't
use starter fluid for anything.

D wrote:

> Update to this problem.
> I got a can of starter fluid and tried it. The car seemed much more
> willing to start, but still no joy. It did huff a lot more, but didn't
> actually start. In my view, this points to more of a fuel problem than
> electrical? If there's concurrence on that, what in the fuel control
> system would be so subject to the cold temperature?
> Would appreciate additional thoughts. Thanks.
>
> "D" <dpfer@r.com <mailto:dpfer@r.com>> wrote in message
> news:OxKzb.105969$Eq1.40720@twister.rdc-kc.rr.com...
> Hi all.
> Hope to find some suggestions here.
> 93 Grand Cherokee Laredo, 6 cyl, auto, 4wd, air etc. Has 220,000+
> miles, been excellent and still is.
> Problem is when the temp gets into the 30's, it will crank and
> crank, give a huff or two like it's trying to start, but no go. New
> plugs, wires, Oxy sensor, other things over the last couple years.
> Read a forum message somewhere on a similar problem and the fellow
> said he finally took off the ECM and heated it in the oven. Seemed
> it had a crack in the insulating material that let moisture get in
> and freeze. Or something like that.
> Possible related symptom; the engine, when running well, gives a
> 'miss' on acceleration at right around 2800 rpm and has for years.
> I've gone through most everything but am really suspect of the MAP
> sensor or the ECM now.
> I've had a lamp on under the hood for overnight, but no help to
> start today. I would appreciate any ideas or suggestions for this
> old beauty.
> Thank you.

Re: 93 Grand Cherokee-Won't Start in Cold
 

Man o Man, Other than an old diesel farm tractor, I wouldn't
use starter fluid for anything.

D wrote:

> Update to this problem.
> I got a can of starter fluid and tried it. The car seemed much more
> willing to start, but still no joy. It did huff a lot more, but didn't
> actually start. In my view, this points to more of a fuel problem than
> electrical? If there's concurrence on that, what in the fuel control
> system would be so subject to the cold temperature?
> Would appreciate additional thoughts. Thanks.
>
> "D" <dpfer@r.com <mailto:dpfer@r.com>> wrote in message
> news:OxKzb.105969$Eq1.40720@twister.rdc-kc.rr.com...
> Hi all.
> Hope to find some suggestions here.
> 93 Grand Cherokee Laredo, 6 cyl, auto, 4wd, air etc. Has 220,000+
> miles, been excellent and still is.
> Problem is when the temp gets into the 30's, it will crank and
> crank, give a huff or two like it's trying to start, but no go. New
> plugs, wires, Oxy sensor, other things over the last couple years.
> Read a forum message somewhere on a similar problem and the fellow
> said he finally took off the ECM and heated it in the oven. Seemed
> it had a crack in the insulating material that let moisture get in
> and freeze. Or something like that.
> Possible related symptom; the engine, when running well, gives a
> 'miss' on acceleration at right around 2800 rpm and has for years.
> I've gone through most everything but am really suspect of the MAP
> sensor or the ECM now.
> I've had a lamp on under the hood for overnight, but no help to
> start today. I would appreciate any ideas or suggestions for this
> old beauty.
> Thank you.

Re: 93 Grand Cherokee-Won't Start in Cold
 

"Man o Man, Other than an old diesel farm tractor, I wouldn't use starter
fluid for anything."

Why?

Re: 93 Grand Cherokee-Won't Start in Cold
 

"Man o Man, Other than an old diesel farm tractor, I wouldn't use starter
fluid for anything."

Why?

Re: 93 Grand Cherokee-Won't Start in Cold
 

"Man o Man, Other than an old diesel farm tractor, I wouldn't use starter
fluid for anything."

Why?