# E36 IAC? **URL:** \ **Category:** Shift518 Automotive\ **Created:** [March 4, 2013, 2:08pm UTC](https://forums.speedlife.net/t/e36-iac/266379 "2013-03-04T14:08:29Z")\ **Posts on this page:** 1\ **Showing post:** 40
**Author:** ![toomanycamaros](https://avatars.discourse-cdn.com/v4/letter/t/7993a0/32.png) [@toomanycamaros](https://forums.speedlife.net/u/toomanycamaros)\ **Post date:** [March 17, 2013, 1:38pm UTC](https://forums.speedlife.net/t/e36-iac/266379/40 "2013-03-17T13:38:01Z")
> [@Tonawanda engine plant hiring if anyone interested.Update post 50ish](https://forums.speedlife.net/t/tonawanda-engine-plant-hiring-if-anyone-interested-update-post-50ish/51924/51): > > The fuel pressure checked out. IN 1st gear the car revs up, but then it strains to build rpms, once it hits 4k, its like hitting a brick wall in any gear. I checked the new MAF, and its a cheap ebay one, so I’m going to go see BMW Joe tomorrow and swap one out and see if thats the issue. I replaced every vacuum line, to include the small on on the FPR, IAC hose, the elbow, CCV, and the IAC. I also reconnected the vacuum, under the fuse box, to the T fitting and replaced the canister just to be on the safe side for now. If I disconnect the MAF the idle will stumble a bit, but then no difference. If this is not the issue, I’ll probably take it and get the cat checked. I’ve only sunk $150 in misc parts so far, most of which is stuff which should be replaced reguardless of this issue. > > Adam-- thanks for the info on the fuel pressure! A low tech way to see if the cat is your problem would be to pull the upstream O2 sensor and see if it makes any difference. --- _[View the full topic](https://forums.speedlife.net/t/e36-iac/266379)._