88 CRX with D15z1 and DX trans - weird problems
I had Import Powerhouse in Phoenix install a D15Z1 engine into my 88 CRX and I have had some weird problems with it ever since.
:rolleyes: 1st, I thought I would be getting much better MPG than 42 avg, were my expectations off?:rolleyes: :confused: 2nd, When I pump the brakes, my idle RPM surges from 500-1400, WTF?:confused: :mad: 3rd, If I go over 5K RPM I get and immediate check engine light and an CEL code of 16, until i turn off the car and restart it will not rev past 3K.:mad: :eek: 4th, the V tech seems to engage at 2700 RPM, how can i increases this to 3200 cheaply? Would it be cheaper to install a HF 5th gear instead?:eek: :confused: 5th, at cruise and maintaining RPM(1K-2.5K)/speed(any)the car surges making me adjust my throttle to compensate, again WTF?:confused: I really appreciate any advice, help or even recommendations of competent mechanics. I must say the guys at import powerhouse did a great job of installing the engine but i am thinking with these issues maybe they were out of there depth with the D15Z1 uniqueness's or maybe it something else entirely. |
With everything operating correctly, you should be getting better than 42 mpg average, especially in a warm place like Phoenix. Two caveats:
1) driving habits have as much to do with fuel economy as how the engine is running. I assume your 5,000 RPM revs are only for test purposes and not a regular part of your driving habits. 2) You may have improved the engine efficiency w/ the D15Z1, but you still have a relatively high rev DX transmission. Other members with a similar setup can tell you how their FE is. I think you can also search the garages as well. The only info I can offer is for problem #3. Code 16 is fuel injectors. Beyond that, I have no clue what the problem may be. |
1 - I think that's very good considering your problems with the car.
2 - Sounds like the alternator maybe? Not sure. 3 - If you have a code, fix what's wrong before thinking anything else is to blame. 4 - Sounds normal. 5 - Could be normal too. If lean-burn is working, it does feel strange. With the non-VX gearing you might need to adjust the throttle. |
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suggestions?
Am ordering a new alt tomorrow, and i got new Fuel injector set in today.
:confused: any other suggestions?:confused: |
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