2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Rebuilt engine hot start

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Old May 1, 2004 | 01:58 AM
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Rebuilt engine hot start

I just rebuilt my engine with Rotary Aviation apex seals, but I did use my old housings. So far I have about 450miles on the rebuild. The problem is when its cold it starts up pretty good, but when its warmed up and I try to start it, the car almost starts but doesnt, then I have to flip my kill switch and it starts right up. I do have all my emissions and rats nest removed, so no hot start assistant.

I also think im running rich, because at idle it idles uneven. Almost like those muscle cars with big carbs. The rpms dont jump around but its kinda like a mini bridge port idle. I did port the engine and went pretty big on the primarys.

Basically im just asking if the problems I am having are normal, and in how many miles should I notice big improvements?
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Old May 1, 2004 | 02:00 AM
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how many miles on the injectors? they could be spraying poorly?
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Old May 1, 2004 | 02:21 AM
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161k on the injectors
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Old May 1, 2004 | 02:58 AM
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100% normal. Don't give flooding issues a second thought until well after breakin. The RA seals are a hard seal, they take longer to break in to old housings than something like an atkins seal, which breaks in quicker because it is softer.
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Old May 1, 2004 | 06:41 PM
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is there a point for me a do a compression test right now?
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Old May 1, 2004 | 07:17 PM
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Ok i just did a compression test on it... the front rotor is getting 100 100 100, the rear rotor is 80 80 80. Hmm, how come the rear rotor has lower compresson? Anyways, is that good for 450miles on the rebuild?
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Old May 1, 2004 | 07:59 PM
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Ok i just did it on a hot engine, and the compression was about the same... except the front went down to about 90, and the rear stayed about the same, well maybe a tiny bit lower.
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Old May 1, 2004 | 09:34 PM
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Must mean that rear housing is not quite as good as the front. Dont worry about setting idle, TPS, checking compression, or even how much power the engine makes right now. IT is in a state of constant change, so just drive it until it is done developing compression, then worry about the final settings.

ON a new housing rebuild, you usually have very good compression right out of the box, and you can do all those settings the first day or so without much to worry about.
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