There is an engine miss when diving forward or backwards?

AL RUARK

MEMBER
1998 DODGE VAN
3.8L
V8
2WD
AUTOMATIC
130,000 MILES

Changed the plugs, wires, cap and rotor, in idle runs good no miss until you put it gear to go forward or backwards, in gear it runs like there is a plug missing. I understand that there is no Mass Air sensor on this vehicle.

Sunday, September 22nd, 2024 AT 11:08 AM

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

You are correct. There is no MAF sensor. However, in its place is a manifold absolute pressure sensor (MAP). I attached a picture of it and its location below.

As far as the issue, have you checked for diagnostic trouble codes? If you have, what did you find?

Let me know as much as you can about what it does, what has been checked, or anything you can think of that may help.

Take care,

Joe

See pic below.

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Sunday, September 22nd, 2024 AT 8:39 PM

AL RUARK

MEMBER
4 POSTS

Hey jake & Nick. Can't seem to fine a replacement for this Map sensor, I got one from Amazon but it don't look anything like the one I removed, the part numbers off of the old one is DL23087 56027940 46435, the one I removed did not have that small L shaped tube that goes onto the small hole, this one has a about a 3/8 opening, unless I took the wrong thing off. I took it off the left side of the carb if your inside
can you help with that
Thanks Al

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Wednesday, September 25th, 2024 AT 4:35 PM

AL RUARK

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4 POSTS

Totally different. The one I got from Amazon stated for a dodge 1998 1500? Went back and checked, they only show one side of the senser, plus the plug is in the front

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Wednesday, September 25th, 2024 AT 5:10 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

I'm not sure what the part is in the pic above. I attached a picture below of the MAP sensor. Also, here is a link to where I found the picture of the new part:

https://a-premium.com/product/Manifold-Pressure-MAP-Sensor-for-1998-Dodge-Grand-Caravan-uMjUg8VQuB?variant=1571124&utm_source=gmc&utm_content=26686985452487015_1571124

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Thursday, September 26th, 2024 AT 11:46 AM

AL RUARK

MEMBER
4 POSTS

Sorry for all the confusion with this problem, so here is what happen, I'm looking at the engine from inside the van that has the removal engine cover inside the van, so trying to comprehend where everything is on this engine so I got turned around not realizing I'm looking and working at the back of the engine instead of the front which is why I mistakenly took off the throttle sensor which is what I sent you the picture of along with the Map sensor, (sorry about that). So, my question at this point is would the Map sensor have anything to do with the problem that I'm having now as to the engine fells like it's missing after changing everything (plugs/cap /wires and rotor).