Hi all, have a problem I am stumped with at the moment. Car is a 95 Civic EX, AT. Motor is a d16y7, all z6 accessory parts, b7 distributor, p06 ecu. Have done this swap before with no issues, and this one was running great until yesterday. It will idle all day just fine, and drive for a short while before any problems emerge. The hesitation/bogging seems to appear when the speedometer cuts out. I replaced the VSS with a spare, same issue. If I pop it in neutral, it will rev fine, and if I downshift like a manual trans, it picks back up, but it struggles to accelerate in drive. No cel's, new plugs, new wires, and swapped distributors with a spare for fun. I think the problem is somehow tied into the VSS issue. Any ideas?

 

Any additional gauge problems or just the speedometer?

 

AT Control module? Check wiring? maybe a bad ground?

 

Does the trans slip? Wouldn't be surprised being its a Honda autotragic

 

speedometer problem only. all other gauges function fine. bogging clears up after appx. 3k rpms

 

The VSS gets voltage from 15A dash fuse 24, which also supplies voltage to the main relay and fuel pump. You may want to voltage test both sides of fuse 24. Are voltages similar or different on each side?

 

i will test it first thing. if not tonight, lol

 

voltages were both 13 and change.

 

so with those results, what would the next step be?

 

The alternator is also on the same circuit. You may want to test it when the problem occurs.

 

in addition to checking on it, i am going to swap in a known good ecu. will post results.

 

Keep us posted. Kind of interested to see what the solution is.

 

swapped in known good ecu. speedo cut out once, hesitation was still present with speedo operating.

 

Try spray cleaning the MAP sensor electrical connector with PB Blaster. It fixed the bogging issues with my 93 del sol si auto. When you reconnect the connector use some force. Also replace the vacuum hose line from this sensor to the vacuum canister. It's about a foot long and 1/4 inch. Got it at Ace Hardware.

 

i actually saw your post searching the forum for similar issues. i did the pb thing to quite a few connectors, seems to still be hesitating a bit. im going to get in this thing with a dmm.

 

Do you have a good working MAP sensor laying around by chance?