What would cause No Boost?
03-02-02, 09:52 AM
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What would cause No Boost?
After breaking in a replacement motor that was limited by 6lbs boost for 1000mi, by using an enlarged pill, I am unable to get boost over 6lbs. I replaced the enlarged pill with a Holley .064 jet but it has no affect. What else should I look at? Thanks.
03-02-02, 10:26 AM
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Does the first turbo go over 6 psi? In order for the second turbo to come online the first turbo needs to reach at least 8psi. Drive around and see if you hear a hissing sound, if so then it's a leak somewhere.
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03-03-02, 09:47 AM
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Only 30,000 mi. Car has Pettit exhaust, DP, PF IC, & Pettit ECU.
When I first wanted to bring the boost back up to snuff, I installed a Profec B, but it refused to have any affect on the boost. I thought it was defective so I removed it and went back to the pills. Now I realize there probably isn't anything wrong with the Profec. The vac line seems fine. The Profec was seeing low boost and no matter how high I turned up the adjustment it had no affect.
When I first wanted to bring the boost back up to snuff, I installed a Profec B, but it refused to have any affect on the boost. I thought it was defective so I removed it and went back to the pills. Now I realize there probably isn't anything wrong with the Profec. The vac line seems fine. The Profec was seeing low boost and no matter how high I turned up the adjustment it had no affect.
03-03-02, 11:48 AM
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Have you checked your wastegate and precontrol actuators? They may be sticking causing them to stay open
03-03-02, 04:52 PM
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Awhile back i replace my vacuum hose and replace the hose that connect to the actuator(wastegate control, or turbo precontrol) forgot which one, but I replace with a regular silicone hose without the pill. Could this cause boost problem, cause I only get about 7-8lbs of boost after 3500rpm to redline. Sounds like my second turbo doesn't kickin.... help?
Does dealer sell these hose with the pills in it? or where can i get these pills?
03-04-02, 07:02 PM
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You can use Holley carburetor jets.
Check out http://www.scuderiaciriani.com/rx7/turbos.html#PIL
Check out http://www.scuderiaciriani.com/rx7/turbos.html#PIL
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