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Join Date: Aug 2000
Location: Petal, MS USA
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IPD Comp kit on 987.1 CS - CEL/running poorly

2008 Cayman S, Manual, 39,500 miles, bone stock, all maintenance up to date, never wrecked, super clean.

I have owned this car for a full year now and like it so much that i decided to keep it and play with it. I have researched many options and watched tons of videos. RENN, P9, PCA, etc.

After much deliberation, I decided to roll the dice with a grand for the IPD comp kit now and then follow with Soul PP full exhaust and tune. Perhaps backwards from the ideal upgrade sequence but the IPD kit is a straight forward bolt on, not as much work or money as full exhaust swap.
I bought the kit 3 weeks ago but just installed it last night. I moved slow and deliberate, triple checking everything. ZERO chance that I left something undone or did anything other than follow the directions. All of the connections are fully on, in place, and tight. The small vac line is plugged with the plastic bit and the longer vent hose is plugged with the aluminum bit.

From the very first engine start (post-install) the engine is running horrible. Idles poorly, engine is missing, will not go above 30 mph, will not go above ~ 3,000 rpm. Even in neutral, mashing the throttle to the floor, only yields about 2800-3000 rpm.

NOTE: Prior to kit installation (24 hrs before install), I pulled the engine cover and let the car cool down from the ride home from work. After 2 hours, pressured washed the top of the engine like i have done twice before. Generally not a big deal, just knock all the dust off with just plain water. Used a fan to help dry the engine for about an hour after and then locked it up tight for the night. Did not restart the car after the wash and before the kit install. In the past, would start the car within an hour after the engine wash to heat it up...help dry. I did not do that this time. It dried "naturally". Have no idea if this has anything to do with my current issue but wanted to mention it,

Anyone with similar experiences? All comments, suggestions and advice is greatly appreciated.

Ron Milliet
Long Beach MS
Old 08-10-2018, 07:33 AM
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Yup. You got something wet using a power washer, that has not dried out yet; or you blew off a vacuum line. This is why we suggest people not use pressure washers on their engine bay...……...
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Last edited by JFP in PA; 08-10-2018 at 09:35 AM..
Old 08-10-2018, 09:31 AM
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Perhaps. Always risk in anything we do to our cars. Also risk in doing nothing, especially where I live, on the gulf coast. My commute to work is roughly 14 miles round trip on the beach highway. That highway is routinely covered in sand blowing off the beach. That sand also contains salt. I don't know of any other way to deal with this. However, you raise some good points and I will double check all the vac lines.

The process I use on the Cayman (3rd time now) is exactly the same use on the M3, M5, and 911 Cab. Never had an issue. However, this is the only time i did not crank the car shortly after the wash.

I plan to reinstall the OE parts. If the engine wash is the issue, I would expect same issue with OE parts.

I will report back.
Old 08-10-2018, 10:01 AM
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Nope, no problem with the pressure washer.

The new throttle body included in the IPD Comp kit is DOA. With this TB connected, P0638 is a persistent code that returns immediately after clearing. The code returns without even starting the engine. The throttle plate is stuck and will not open. The plate does not move when the accelerator pedal is pressed. The plate should move with the key in the run position, engine off. I reconnected my stock TB, code cleared and the plate moves as expected.

On the bench, with both TBs side by side, the stock plate will easily move back and forth with your fingers. The new TB acts jammed, will not move.

I bought this kit directly from Michael at IPD. I will give them a call in the morning to sort out getting a replacement.

Enjoy your Sunday.

--Ron
Long Beach MS
Old 08-12-2018, 11:16 AM
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Just closing the loop on this thread. Thank you for posts, emails, and IMs on this topic.

RESULT: The GT3 TB included in the IPD comp kit was DOA. Defective right out of the box. The most obvious sign/symptom was the inability to manually move the throttle plate. Greg at IPD was fantastic. One phone call and after about 5 mins, a new TB was on its way. Greg included a pre-addressed and pre-paid UPS label that i used to return the defective part.

IMPRESSION: With the new part installed, the engine started right away. No CELs, no spit, no sputter, no cough, no wheez. That is the good news. Unfortunately, there was also: no difference. If I had not installed the part myself, I would not know the kit was installed. After 250 miles, no difference in acceleration, no difference in throttle response, no difference in sound. Not having access to a dyno, I decided to do a series of before and after rolling sprints. 2nd gear only, 20 mph per cruise control, full throttle to 65 mph per the speed limit gong on dash. Just using a stop watch measured 10 sprints each, before and after: Before 6.55s and (250 miles) After 6.51s. 4/100th of a second should be well within any margin of error for this sort of test. Frustrated by lack of progress, I pulled the engine cover and went back over every detail of the simple install. I also did a DME reset by way of battery disconnect. I also used Durametric to look for any codes or anomalies that might be suspect, none found.

NOTE: 2008 Cayman S, bone stock, 40,000 miles with recent major service performed. My car does not have PSAM, PSE, or Sport Chrono. 6sp manual.

I must make a quick decision to keep or return the kit. I am a little outside the 30 day window but feel like Greg would be fair since the time I lost dealing with DOA TB unit. I do plan on eventually replacing headers and exhaust.

Comments, suggestions, and advice all appreciated.

Ron Milliet
Long Beach MS
Old 08-27-2018, 12:12 PM
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Quote:
Originally Posted by rpmillie View Post
Just closing the loop on this thread. Thank you for posts, emails, and IMs on this topic.

RESULT: The GT3 TB included in the IPD comp kit was DOA. Defective right out of the box. The most obvious sign/symptom was the inability to manually move the throttle plate. Greg at IPD was fantastic. One phone call and after about 5 mins, a new TB was on its way. Greg included a pre-addressed and pre-paid UPS label that i used to return the defective part.

IMPRESSION: With the new part installed, the engine started right away. No CELs, no spit, no sputter, no cough, no wheez. That is the good news. Unfortunately, there was also: no difference. If I had not installed the part myself, I would not know the kit was installed. After 250 miles, no difference in acceleration, no difference in throttle response, no difference in sound. Not having access to a dyno, I decided to do a series of before and after rolling sprints. 2nd gear only, 20 mph per cruise control, full throttle to 65 mph per the speed limit gong on dash. Just using a stop watch measured 10 sprints each, before and after: Before 6.55s and (250 miles) After 6.51s. 4/100th of a second should be well within any margin of error for this sort of test. Frustrated by lack of progress, I pulled the engine cover and went back over every detail of the simple install. I also did a DME reset by way of battery disconnect. I also used Durametric to look for any codes or anomalies that might be suspect, none found.

NOTE: 2008 Cayman S, bone stock, 40,000 miles with recent major service performed. My car does not have PSAM, PSE, or Sport Chrono. 6sp manual.

I must make a quick decision to keep or return the kit. I am a little outside the 30 day window but feel like Greg would be fair since the time I lost dealing with DOA TB unit. I do plan on eventually replacing headers and exhaust.

Comments, suggestions, and advice all appreciated.

Ron Milliet
Long Beach MS
From what I have seen, this combination makes marginally more power only at the extreme end of the RPM scale on "ten tenths" engine's (fully modded out). Multiple dyno pulls on different cars show small, but measurable gains only at very high RPM's, so I would not expect to "feel" much difference at lower revs or in normal driving.
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Old 08-27-2018, 06:24 PM
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